Entertainment TV Kim Kardashian Wishes Caitlyn Jenner a Happy 72nd Birthday: 'Can't Wait to Celebrate You' The former Olympian turned 72 on Thursday By Glenn Garner Glenn Garner Instagram Twitter Glenn Garner is a Writer/Reporter who works heavily with PEOPLE's Movies and TV verticals. Since graduating from Northern Arizona University with a dual major in journalism and photography, he got his professional start at OUT Magazine, The Advocate and Teen Vogue, and he's since consistently kept his finger on the pulse of the LGBTQ community. His first book The Guncle Guide was released in 2020 and was featured on Katie Couric's list of 100 recommended books of the year. People Editorial Guidelines Published on October 28, 2021 05:44 PM Share Tweet Pin Email Trending Videos Photo: Kim Kardashian/Instagram Kim Kardashian West took a moment to honor Caitlyn Jenner as she celebrated another trip around the sun Thursday. The SKIMS mogul, 41, wished her former step-parent a happy 72nd birthday on her Instagram Story, posting a throwback photo of the two of them at the 2020 Vanity Fair Oscars party. "Happy birthday @caitlynjenner," Kim wrote. "I love you so much and can't wait to celebrate you." Her sister Kourtney Kardashian also shared some memories with Caitlyn, posting several photos from family outings in recent years. "Happy birthday!!" wrote Kourtney, 42. Kourtney Kardashian/Instagram Kim Kardashian Watches Caitlyn Jenner's Episode of Netflix Series Untold — 'This Doc Though!' One photo was from Caitlyn's 70th birthday dinner at Nobu Malibu in 2019. Kim and Kourtney were in attendance, as were Kendall, 25, Kylie, 24, Brody, 38, and Brandon Jenner, 40, as well as Brandon's now-wife Cayley Stoker and Caitlyn's friend and manager Sophia Hutchins. Caitlyn welcomed Brody and Brandon with ex-wife Linda Thompson, 71, and she also shares daughter Cassandra Marino, 41, and son Burt Jenner, 43, with ex-wife Chrystie Scott. She was step-parent to Kourtney, Kim, Khloé, 37, and Rob Kardashian, 34, when she was married to Kris Jenner, 65, with whom she shares Kendall and Kylie. Though Caitlyn came out as transgender in 2015, two years after she and Kris announced their separation, she told PEOPLE last year that some of her kids still call her "dad." "I'll be their dad until the day I die," Caitlyn said. RELATED VIDEO: Kylie Jenner Is Pregnant, Expecting Second Baby with Travis Scott The Olympic gold medalist is preparing to welcome two new grandchildren, as Kylie is expecting her second baby with Travis Scott, 30. Caitlyn spilled the beans just days before Kylie's official announcement in August, revealing that she had another grandkid on the way, and Kendall later revealed that Burt is expecting his third baby. "Eighteen grandchildren. I keep telling the girls — they're not too excited about this, but — I wanna go for 30," Caitlyn said. "Thirty grandchildren. It's a round number. I just found out the other day that I have another one in the oven. Yes, I found that out the other day. So that's 19."