updated 03/13/2011 AT 4:00 PM ET
•originally published 03/13/2011 AT 5:10 PM ET
Charlie Sheen’s “winning” ways didn’t score him an invite to his sons’ birthday party.
“The party is a casual and child friendly celebration,” a source tells PEOPLE of the bash at Kathy and Rick Hilton’s Bel Air home. “It’s all about Max and Bob and their friends. They seem to be having a great time, and so is Brooke.”
Sheen was never expected to attend.