The former Olympian – who turns 66 on Wednesday – kicked off festivities a day early with youngest daughter Kylie Jenner and former stepdaughters Kimand Kourtney Kardashian.
The ladies gathered at The Villa Restaurant in Woodland Hills, California, and were joined by Kourtney’s daughter Penelope, 3, as well as E! camera crews.
Kylie, 18, snapped a selfie at the family lunch to commemorate the special day. “Early birthday lunch with @caitlynjenner Happy birthday dad what an amazing year for you,” she wrote.
She also took to Instagram to show off the Alexander Wang minidress she wore to the celebration.
Missing from the birthday lunch were Kendall Jenner and Khloé Kardashian.
Khloé, 31, has stuck by husband Lamar Odom‘s bedside after he was found unconscious in a Nevada brothel with drugs in his system. The former NBA player is currently being treated at Cedars-Sinai Medical Center in Los Angeles.