Brody Jenner engaged to Kaitlynn Carter

Reality TV star Brody Jenner is engaged to marry his girlfriend Kaitlynn Carter.

Brody, the son of transgender TV personality Caitlyn Jenner and actress Linda Thompson, popped the question to Kaitlynn while the couple were enjoying a vacation in an unknown tropical location.

He announced the news on Instagram by sharing a picture of bikini-clad Kaitlynn kissing his neck as he smiles for the camera. An engagement ring can clearly be seen on her finger.

"On May 4th 2016 I got engaged to my lover and best-friend," Brody, 32, wrote in the caption. "I couldn't be more in love with this woman and I can't wait to spend the rest of my life with her."

Blogger Kaitlynn also shared a similar photo on Instagram and wrote, "This trip has been memorable for many reasons...(heart emojis) happiest girl in the world!!!"

The couple have been dating since 2014.

In March (16), Brody made it clear in an interview with Yahoo Style that he wasn't close to the Kardashian family and disliked being tied to them because of his father's marriage to Kris Jenner.

"I don't see them very often," Brody said of the Kardashian sisters. "I live out in Malibu, they live in Calabasas. To be honest, I don't even really know Kanye that well at all. I've really only met him one time...

"That's the one thing that people don't really understand is that we live two completely separate lives. And everybody ties us in together as the Kardashians and the Jenners. I mean, (Kris and Caitlyn) got a divorce, so they're not even technically my family anymore."

Brody previously dated reality stars Kristin Cavallari, and Lauren Conrad, and singer Avril Lavigne.