He has always been overshadowed by his brother Alec both on and off screen.
But perhaps William Baldwin finally has some bragging rights after locking lips with saucy Kaylee DeFer on the set of Gossip Girl in New York today.
The 49-year-old looked like he quite enjoyed getting to grips with the actress, who is half his age.
Sealed with a kiss: Kaylee DeFer and William Baldwin locked lips on the set of Gossip Girl in New York today
The pair seemed to be having a great time together as they recorded the intimate scenes in the Upper East Side of Manhattan.
And fans will no doubt be eager to find out just what is going one between the pair.
Getting ready to show his experience: Billy picked up screen kissing tips from Sharon Stone in 1993's Sliver