Caitlyn and her ex-wife Kris, who were married for nearly 25 years, put aside any past drama and posed for pictures at the showcase in New York as they watched Kendall from the wings.
They also shared a hug before chatting in front of photographers and were all smiles as they stood front row at the showcase.
Kris attended the event with her new flame, Corey Gamble, and she posed up a storm in a high-neck sparkly mini dress. She later tweeted: "So incredible! Beyond proud of @KendallJenner #dreamsdocometrue."
Meanwhile, former Olympian Caitlyn kept it simple in a black dress with sheer sleeves.
This week, Caitlyn accepted one of Glamour's Woman of the Year awards as she was honoured for her transgender advocacy work.
After introducing her true identity in an interview with Diane Sawyer, she transitioned from Bruce to Caitlyn and debuted on the cover of Vanity Fair, and has since been working to raise awareness of the transgender community.
Try Reveal's digital edition on iPhone & iPad. Subscribe now & never miss an issue!