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On October 28, the Kardashians star celebrated the Olympian's 75th birthday with his stepbrother Brody Jenner, his fiancée Tia Blanco, and their 15-month-old daughter Honey.
"Last night birthday dinner in Malibu was so special," Caitlyn posted on Instagram on October 29. "Family comes first! Numerous children and grandchildren in one location at the same time."
The I Am Cait alum went on to say that the people in her post were "just a few" of the many people present, adding, "You all made my birthday evening so special... and the night was made even more enjoyable by your incredibly kind and considerate gifts (WOW!).
In addition, she said, "I love you all so much."
In one of her pictures, Caitlyn was seen taking a selfie with Kim, and in another, the two were seen posing with friends, including Sophia Hutchins, Caitlyn's manager and longtime friend.
On October 29, Kim posted the selfie to her personal Instagram page with the message, "Happy 75th Birthday." I cherish you.
On her Instagram Stories, Kourtney Kardashian shared a picture of Caitlyn's birthday cake.
Some Keeping Up With the Kardashians alumni did not, however, make it to the celebration. The 27-year-old Kylie Jenner did not attend the event since she was in New York for the CFDA Awards that evening.
Someone else who probably didn't show up for the party? Kris Jenner, Caitlyn's ex-wife, and her two daughters, Kylie and Kendall Jenner, both 28.
Last year, the retired athlete noted that she and Kris, who divorced in 2014, "never talk to each other anymore."
"It's sad," Caitlyn said on ITV's This Morning, adding that she's "much closer to the Jenner side," which also includes his son Brandon Jenner with ex-Linda Thompson and his children Burt Jenner and Cassandra "Casey" Marino with ex-Chrystie Scott.
"When you have as many kids as I have, you're closer to some than you are to others," she said. "And it's kind of that way through there, through that side of the family."