Scott Disick and Sofia Richie reportedly broke up after more than 3 years of dating. Here's a timeline of their relationship.

Along with a group of friends, Disick and Richie, then 19, both celebrated the reality star's 34th birthday on a yacht in France.

Daily Mail published a series of photos showing Disick and Richie playfully wrestling, snapping selfies, and hugging each other.

And while they appeared to be flirty on board, Disick had also recently been seen with women like Bella Thorne, Chloe Bartoli, and Maggie Petrova.

Richie dispelled subsequent rumors that she and Disick were an item in a since-deleted tweet. She wrote, "Just so everyone can get their panties out of their a--es scott and I are just homies. Relax."

Shortly after the photos of Richie and Disick were published, Daily Mail shared photos of the bachelor cuddling with another woman, model Bridget Satterlee, on the yacht, showing that Disick was still single.

Disick and Richie enjoyed dinner together at Nobu in Malibu. Both dressed casually and linking arms, they came off as more than "homies," as Richie claimed following their photos from Cannes.

They didn't appear to be hiding the fact that they were spending time together and sat directly next to each other in the front row of the Kith Sport fashion show at the Classic Cat Club in New York City.

"Since returning to LA, Scott and Sofia are inseparable. They are spending every day together. Sofia seems smitten," a source told People.

"It's obvious that she looks up to Scott. She constantly giggles around him. They are very flirty," the source said. "Scott takes care of her, opens the car door, and pays for everything."

The "KUWTK" star took his followers by surprise by sharing a photo of himself and Richie in Miami, Florida, on his Instagram story, appearing to confirm that they were together. The model posted a similar photo to her own Instagram story.

During their trip, Richie and Disick enjoyed a chocolate dessert with "Congratulations Scott and Sophia" written on the plate, hinting that they'd made the relationship official.

Posing in front of the beach with her arms around Disick, Richie confirmed that they were indeed a couple in an Instagram photo. While on their trip to Mexico, they were also photographed enjoying each other's company on a jet ski.

The couple traveled to Italy together, posing for photos over the canals in Venice. Richie shared a picture of them together to her Instagram account.

Disick and Richie showed up to their first event together as a couple during Art Basel at Kick-Off at The Confidante in Miami, Florida.

While in Miami, Florida, during Art Basel, Richie and Disick kissed and enjoyed a variety of treats at the Sugar Factory.

The duo spent their first New Year's Eve together in Aspen, Colorado. While walking around the ski town, photographers captured photos of Richie and Disick bundled up with winter gear.

Trading ski boots and parkas for swimsuits and water, Disick and Richie continued their travels. Disick posted a photo of them perched up against a helicopter, while Richie showed them cuddled up on a boat.

A fan account shared a since-deleted Instagram photo of Disick in the car with Richie, who sat in the passenger seat, and his children, who were in the backseat.

Kendall, Kardashian's half-sister, commented, "Awww scott and his kids," with a laughing emoji, hinting that the 19-year-old was young enough to be his daughter.

The supermodel was the first Kardashian-Jenner family member to speak out on Disick's relationship with Richie.

Kardashian's mom, Kris Jenner, brought up Disick's relationship with Richie during an episode of "Keeping Up With the Kardashians."

After Disick admitted that he was dating one person exclusively, Kris asked if it was Sofia. He confirmed that they were dating and said that it was "something new."

Kris then brought up the age gap between them and asked, "Wait, how old is she?"

Reluctant to answer her question, Disick confirmed that she was 19 and he was 34, pointing out that she wasn't underage.

The model posted a black-and-white Instagram photo of herself sitting on Disick's lap with his arms wrapped around her.

"Happy Valentines babe," she captioned the picture.

During an interview with The Daily Telegraph, the musician hinted that he's not overly keen on his daughter spending time with Disick.

"She's 19," he said. "When you're 19, you know everything. Is it going to be for life? I don't know. But for right now, it's just a phase and I'm going to stand real still in the corner, get me a good drink, and not make too much noise."

Lionel also continued to call the Kardashian family, who Disick spends much of his time around, "a well-oiled machine."

"When you hang around the reality world, who knows what you are really doing? This is a well-oiled machine, the Kardashian machine. I don't really know what to think. I told Sofia I will have no opinion. I'll continue to be my cheerful self and move on," he said.

"Happy Birthday babe! Thank you for being you," she captioned the photo she posted to celebrate Disick's 35th birthday. According to People, the couple traveled with Disick's children to St. Barts for the occasion.

Disick showed up to West's album release party in Jackson Hole, Wyoming, without Richie. People wondered if they'd broken up after he was seen with his arms around a woman's waist and flirted with her for "at least two of Kanye's songs," as reported by TMZ.

The outlet shared a photo of the reality star hugging the unidentified woman and said that Disick was overheard stating that he and Richie weren't together.

"Sofia and Scott split up," a source told Us Weekly. "He cheated on her in Miami and she found out."

The source also explained that Richie heard about cheating rumors after their trip to St. Barts.

"He went to Wyoming because of it and was photographed with another girl and that was the icing on the cake for her to break up with him," the source explained.

Sources told TMZ that Richie "wasn't happy" with the photos of Disick from West's party, however she hadn't broken up with him as many outlets had reported.

They explained that Disick had known the woman at the party for years and was friends with her, noting that he didn't leave with her. The sources also said that it was the "booze talking" when the reality star said that he and Richie weren't together.

Disick shared a screenshot of the article on his Instagram story and wrote, "We had no idea we even broke up but thanks for thinking of us."

Days later, Richie also addressed the rumors on her Instagram story and said, "Never believe the Internet."

The couple appeared to be going strong and took a summer vacation together to Mykonos, Greece. Richie posted a photo of them together in town, and Disick shared a selfie of himself in front of the water.

When asked about her relationship with Disick on an episode of the Australian talk show "The Morning Show," the model gave every indication that the relationship was strong.

"We're very happy," she replied. "I'm very happy."

Both Disick and Richie traveled to the Middle East together and documented their adventure with photos of themselves in the desert.

Kardashian, Disick, and Richie lounged side-by-side in swimsuits while on family vacation in Mexico, showing that they appeared to be getting along.

"What more can a guy ask for. THREE'S COMPANY," Disick captioned the Instagram photo.

"Scott feels like, 'Why change something if it is working?'" a source told Us Weekly, adding, "And Sofia is still, obviously, very young."

The source added that marriage was "still talked about between Scott and Sofia and between the other members of the Kardashian family."

During an episode of E!'s "Flip It Like Disick," the couple debated whether or not to move from Hidden Hills to Malibu.

While they spoke, Richie joked that Disick's home was a "bachelor pad" when she first arrived and said she'd like to be involved with decorating their new house.

Disick then gushed about Richie and the positive influence she has on him.

"I think it's hard anywhere to find somebody that you can be comfortable with, and the truth was without her I was always looking for somebody or something," he said. "She's definitely been that little piece that's calmed me down and made me a better man and made things easier in my life."

Disick said that having Richie and Kardashian together was "a really awkward situation" in a "Keeping Up With the Kardashians" episode.

At one point during the episode, he told Kardashian, "I want you and Sofia to be comfortable, but it does take a toll on me."

And while all three of them sat down for a meal, Richie pointed out that Disick changed his behavior when Kardashian was around.

"You're a lot more sophisticated with me when Kourtney is around," she said. "You turn into a 5-year-old when it's just us."

During an episode of "Keeping Up With the Kardashians," Kardashian pointed out that Richie's makeup wasn't blended when the family was together in a hot tub.

"It's like a literal line," Kardashian told her while Disick looked visibly uncomfortable. After he suggested they get out of the hot tub, Kardashian called him out for being negative.

She posted several black-and-white photos from the event. One picture was of her and Disick, and another included Kylie and Kardashian. Richie's mom, Diane, also attended the event.

The couple enjoyed sparkling water from a bathtub in an Instagram photo that Richie shared.

She wrote, "Staycation .. for now."

Richie traveled to Las Vegas with girlfriends like Kylie, Yris Palmer, Anastasia "Stassie" Karanikolaou, and Victoria Villarroel to celebrate her 21st birthday.

Disick joined the festivities, which took place at Wynn Las Vegas.

The couple snapped a mirror selfie of their coordinated costumes as Barbie and Ken. Richie posted the photo to Instagram along with an image of the original plastic dolls for comparison.

She told Entertainment Tonight that she's elected not to reappear on "KUWTK" in the near future.

"Well, because I want to get into acting!" she told the outlet. "I feel like, for a while, I kind of held back on things because I was afraid of failure, but 2020 is [the year of] no fear! I'm gonna be doing acting stuff really soon."

She continued, "Great things are happening and I'm really excited about it."

Eagle-eyed fans noticed that the reality star followed Richie for the first time after more than two years of dating.

The follow came days after outlets reported that Richie had unfollowed Kourtney on Instagram and announced that she wouldn't return to "KUWTK."

A source told E! News that Richie and Disick "bicker at times" but assured that "things are okay with them."

"They make empty threats that it's over and then they get back together. They are comfortable together, so it's easy to say things that you don't mean. They have drama but always end up fine," the source said, adding that they spend a lot of their time together.

The source shared that their fights escalate at times, and "Sofia will take her stuff and leave for a day or two."

Even though they fight, the source explained, "They know they would rather be together than apart."

Richie addressed criticism of her relationship with Disick in her April 2020 cover story for Cosmopolitan.

Aware that people hold strong opinions about her and Disick, Richie said she has "this weird thing where I just don't care what people think."

She added that the negative energy "doesn't bother me because I'm very happy. Why would I let someone from the middle of nowhere ruin that for me?"

The reporter noted that the interview was conducted at Disick's home, where she lived.

The Daily Mail was the first to report that Disick had checked into a rehab facility in Colorado, stating that he had been "drinking heavily" and "taking cocaine" while self-isolating during the pandemic.

A source told People, "He knew he was spiraling out of control and wanted to get help. He wants to be the best dad possible. Sofia and Kourtney both encouraged him to get help."

Us Weekly spoke with a source that said, "Sofia noticed a change in him and that he wasn't as healthy and happy as he could be and Scott made the decision to get help for himself and for her and their relationship."

Disick went to the facility to work through "past traumas," namely his parents' deaths, according to his lawyer Marty Singer.

"In an effort to finally come to terms and deal with the pain that Scott has been silently suffering for many years due to the sudden death of his mother, followed by the death of his father 3 months later, Scott made the decision to check himself into a rehab facility last week to work on his past traumas. He did not check in for any alcohol or cocaine abuse," Singer told People.

Disick has since left due to privacy concerns and threatened to sue after a photo of him inside the building was leaked.

After Disick returned to his California home, Richie reportedly helped care for him. A source confirmed that they were still dating and told E! News that the 21-year-old was "supporting him at home."

TMZ published photos of Richie with a new man. The outlet reported that Richie spent the last three days at his house in Malibu, California, causing people to speculate whether or not she and Disick had split up.

"Scott and Sofia are on a break until Scott straightens himself out more," a source told Us Weekly. "Scott is in an OK place right now and is trying to get better and focus on work, but he has to prove himself."

Multiple outlets confirmed that Disick and Richie had ended their relationship.

"Scott had gone back to his old ways," a source told Page Six, adding, "Sofia got fed up."

The source also said that Kardashian "didn't make it easy for her" to date Disick, which eventually took a toll on Richie.

E! News also confirmed the news and spoke with a source about where Richie and Disick stand.

"They are technically 'split' but Sofia has been in touch with Scott," a source told E! News, explaining that there wasn't a "fight" or "anything bad that happened between them."

"Sofia thinks Scott has a lot on his plate right now and thinks it's best for them to be apart so he can focus on himself. She is only looking out for him and his best interest and it was primarily her decision for them to split," the source said. "Sofia has been spending time with her family and has taken majority of her stuff out of Scott's house."

While the source confirmed that they're no longer together, they mentioned that it's possible that they will rekindle in the future.