Caitlyn Jenner's Son Burt Welcomes Baby Boy

Caitlyn Jenner steps out for a cup of coffee at Starbucks on Thursday morning (July 7) in Malibu, Calif.

The 66-year-old former Olympian and reality star has a new member in her family as her eldest son, Burt Jenner, welcomed a baby boy with his longtime girlfriend Valerie Pitalo!

“She did it!” Burt captioned an Instagram photo of Valerie with their newborn son that same day. See the picture below.

Burt, a race car driver, announced the news that he was expecting back in December.