"Happy happy 24th Birthday!" Eileen, 60, captioned a photo of Vinny. "To this stellar human being @vinnyvanpatten I remember when you were just a little 'Flea'. I love you!"
Eileen also posted a photo of Vinny with his brothers Richard and Jesse. She captioned the snap with #ourthreesons and #happy24.
Jesse is the son of Eileen and husband Vincent Van Patten. Vincent, 61, shares Vinny and Richard with ex-wife Betsy Russell.
Eileen, Vincent and Betsy, 55, took Vinny out to a local Mastro's Restaurant in California to celebrate his big day.
The former Young and the Restless star looked smashing in a multicolored dress and hat for the big occasion.
Eileen has a penchant for posting special memories on her Instagram.
She took fans inside her 15th wedding anniversary celebration with Vincent back in June and also shared many moments from her wild nights in Las Vegas in May.