Kourtney Kardashian announced she's pregnant with her and Travis Barker's first child. Meet all of the Barker-Kardashian children.

Barker and Moakler welcomed their eldest son, Landon, in October 2003. He made his television debut on the former couple's MTV reality show, "Meet the Barkers." He remained relatively mum through the years but recently began following in his father's footsteps by releasing music.

He released his single, "Holiday," under his stage name OTG Landon in October 2020 and later uploaded a song titled "Die in California" to his Instagram account in March. Landon told his followers he wrote the song at a studio while Machine Gun Kelly recorded nearby. He also appeared in Machine Gun Kelly and Mod Sun's 2021 film, "Downfalls High."

Landon was among the guests at Kardashian and Barker's Italian wedding, where he praised the couple during his speech.

"You look out for me like a mother and have always had my back," Landon said of Kardashian, adding that he's "so thankful" for his father.

He's currently dating influencer Charli D'Amelio.

Alabama is Barker's second child with Moakler, born in December 2005. Like Landon, Alabama appeared on the family's former MTV series and is heavily involved in music. On YouTube, Alabama released "Our House" in October 2017 and "Heartbreaker" one year later. She's since delved into rap music, sharing a snippet of an unreleased song on her TikTok account in May.

She later defended her decision to pursue rap after some fans questioned the move online, according to People.

"Since I could walk, I was in the music industry. I was watching my dad perform in punk bands, rock bands, in rap concerts, everything," Alabama said in a now-deleted TikTok video. "So, for the people that say, 'Oh, she doesn't know anything about rap music. She didn't grow up around rap music. Why is she doing this? Why is she doing that?' I've been influenced by rap my entire upbringing and punk rock."

Alabama shared behind-the-scenes photos from her father's wedding and later spoke out after Barker was hospitalized in June 2022.

Atiana, born in March 1999, is Moakler's daughter that she shares with former boxer and ex-husband Oscar De La Hoya. Moakler married Barker in 2004 and divorced in 2008, making Atiana his stepdaughter.

Atiana also appeared on "Meet the Barkers" when it aired in 2005 and often appears on social media with her family. She's also praised Barker for his parenting skills, including in an Instagram post shared on Father's Day in 2019.

"Thank you for always putting us first and being there for me no matter what," she wrote. "love you so much."

Atiana told Page Six that she began modeling at 14 years old, but took a brief hiatus before returning to the industry around January 2021. She also paints luxury handbags under the Instagram account @artbyatiana, counting celebrities like Machine Gun Kelly as a customer.

In addition to "Meet the Barkers," Atiana's appeared on "MasterChef USA" in 2019 and "The Kardashians" in 2022.