16 times celebrities were absolutely starstruck by other famous people

"Parasite" won four Oscars, including best director and best picture, and perhaps no one was more surprised than director Bong Joon Ho.

His acceptance speeches contained several jokes about how much he was going to drink after the show, but even more touching than his cheerful humility was his tribute to directing legends Martin Scorsese and Quentin Tarantino during his speech for best director.

Joon Ho started the speech by sharing a Scorsese quote that he studied in film school and expressing the honor it was to be nominated with him.

"When I was young and studying cinema there was a saying that I carved deep into my heart, which is 'The most personal is the most creative,'" Joon Ho said, according to his translator. "That quote was from our great Martin Scorsese."

He went on to thank Tarantino for promoting "Parasite" when it was still relatively unknown in the US. "Quentin, I love you," Joon Ho added, in English.

He ended his speech by saying he wishes he could get a Texas chainsaw and split his trophy into five pieces to share with all the directors nominated in the category.

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Jennifer Lopez told Ellen DeGeneres that she had a total fangirl moment when her fiancé Alex Rodriguez surprised her with an anniversary present: a FaceTime call with "Fixer Upper" star Joanna Gaines, according to People magazine.

"We got a little fixer-upper next to the water, and we were like, 'Oh, we gotta fix this up, it's really a house that needs work,'" Lopez said. "I was like, wouldn't it be amazing to have (Gaines) do it for us? But she doesn't do anything outside of Waco, like nothing."

Lopez said that when she got the call, she asked Gaines to give her just a little bit of help on the design decisions for their place.

Cardi B met Lady Gaga at the 2019 Grammys and the pair was spotted in some adorable photos— but Cardi's admiration for Lady Gaga actually dates back further than that.

"When I was a teenager Lady Gaga changed my life," she wrote in 2016. "She inspired me to be myself & be different."

Gaga responded to that tweet in 2018, telling Cardi she loved her and also responded to a video of Cardi performing Lady Gaga's hit "Bad Romance" during her high-school talent show.

Following the Grammys, Gaga defended Cardi B from people who criticized her in the wake of her win for best rap album — the rapper was the first solo woman to win the award.

"It is so hard to be a woman in this industry," she tweeted, alongside a photo of the pair. "What it takes, how hard we work through the disrespectful challenges, just to make art. I love you Cardi. You deserve your awards. Let's celebrate her fight. Lift her up & honor her. She is brave."

When actor Adam Scott was a kid, he sent "Star Wars" star Mark Hamill a letter inviting him to his birthday party.

Hamill, unfortunately, didn't get to attend but he decided to make up for it by surprising Scott on "Jimmy Kimmel Live" years later.

Hamill appeared on stage, lightsaber in tow, and Scott was shocked. He was shaking, beaming, and quite a lot of expletives were thrown around.

When Mariah Carey was right behind her on the red carpet for the 2015 New York premiere of "The Intern," Anne Hathaway couldn't contain her excitement.

"I'm freaking out," she told the interviewer. "She's like two arm lengths away right now."

In 2014, on radio show 2DayFMSydney, Emma Stone and Andrew Garfield sang and danced to "Stop" by The Spice Girls because Stone is such a big fan.

Then, she got the shock of her life via a surprise message from Scary Spice Mel B. Her reaction was priceless and she couldn't stop talking about how excited she was.

Lawrence has been outspoken about her admiration for actor Bill Murray. So, when Bill Murray made a surprise appearance at the 2015 San Diego Comic-Con, Jennifer Lawrence was visibly excited.

She posed for photos with him and you can see the excitement on her face. Later she said that she had been trying to work with him for a while.

"I kind of spoke to him through Woody Harrelson. I would send emails to Woody, mostly when I was drunk, of things I always wanted to say to Bill Murray,"

She told reporters later, according to Entertainment Tonight. "So he received them. So just the fact that Bill Murray knows that I exist was part one. Part two, he wanted to speak to me. And he like, mentioned something about us working together, I don't know! I'm excited about that, that was cool."

"Stranger Things" star Millie Bobby Brown has never been shy about her fascination with The Kardashians.

In 2017, on "The Tonight Show Starring Jimmy Fallon," she shared her obsession with "Keeping Up with the Kardashians" and the special "Kardashian language."

When they saw the interview, the Kardashians responded in kind: "I love you @milliebbrown, you are so adorable! Thanks for watching #KUWTK! We are huge fans of yours also!! @jimmyfallon #Okurrr," Kris Jenner wrote on Twitter.

"It's a mutual love fest!! I LOVE you @milliebbrown! #Okurrrrttt this video made me smile from ear to ear BIBLE," Khloe Kardashian wrote.

When she finally met Kim, she made an appearance on her Snapchat.

Sophie Turner might not have officially met Ryan Gosling, but she did manage to snap a selfie with him — sort of.

The "Game of Thrones" star took a picture of herself with the actor in the background, along with the caption: "Sorry boys. I'm off the market."

In 2014, the actress experienced a moment of utter excitement when she came face-to-face to "Homeland" star Damien Lewis on the red carpet.

She immediately told the reporter she was speaking to "be cool," panicked some more, and then pinned herself to a wall when Lewis looked over.

They two ended up hugging, Lawrence profusely complimented his show "Homeland," and then worried out loud that her ears were turning red.

In January 2020, "Friends" star Jennifer Aniston played guest host on "The Ellen Show" and was tasked with interviewing Gomez.

While on the show, Gomez spoke about how she's a huge "Friends" fan and she recalled the very first time she met Aniston, which was in a bathroom.

"Nobody knew who I was and you were in the bathroom wearing a black dress ... and I was there with my mom," Gomez explained, adding that her "heart stopped" when she saw Aniston.

Gomez said that right after she met Aniston, she ran out of the bathroom to tell her mom about it.

Years ago, musician Selena Gomez was told that she was going to meet a fan and instead walked right into "Transformers" star Shia LaBeouf's dressing room.

She immediately ran away and he came out to check on her. The two shared a sweet moment, snapped a picture, and the singer scurried away again.

Gomez waited until she was alone to express her utter excitement, as evidenced in the clip.

"Game of Thrones" star Emilia Clarke shared the couch with "Friends" actor Matt LeBlanc during an episode of "The Graham Norton Show" in 2016, and was positively giddy.

"I'm actually blushing," she said. "I just think you're wicked."

Clarke even got LeBlanc to say his "Friends" character's signature catchphrase "How you doin'?"

In November, Katie Couric had Julie Andrews give Jennifer Garner a surprise phone call — and shortly after the experience, Garner shared her visible excitement on Instagram.

In a photo collage, Garner can be seen physically expressing her excitement, kicking up her leg and even covering her face with her hand.

"I'm sure you'll be shocked to learn this, but I love her," Garner wrote, referencing Andrews.

"I met Brad Pitt actually at the 'Once Upon a Time in Hollywood' premiere," Chris Hemsworth recalled in an interview with People.

The "Thor" star was apparently so in awe of Pitt that he wasn't exactly on the same page as him in terms of a greeting.

"He went to do a handshake and I went for the hug, he was fine with it," Hemsworth added. "I didn't get attacked by security team or anything. It was fantastic. He was as wonderful and pleasant as I'd hoped and imagined."

While on "The Graham Norton Show," singer Camila Cabello shared that she was pretty starstruck to meet Emilia Clarke, who played Daenerys Targaryen on HBO's "Game of Thrones."

"My queen," Cabello said as she approached Clarke. "I'm sorry. I would just like to say I am the biggest 'Game of Thrones' fan in the entire world ... I'm just freaking out to meet you guys."

"I've never fangirled so hard in my life," the singer added, explaining she watched all of "GOT" in a month.

She later Instagrammed a photo of herself "bending the knee" in front of Clarke as though she were royalty. Clarke responded to by reposting the photo and writing, "GURL the feelings mutual... thank you for making me feel like a khalessi all over again."