Charlie Sheen’s Twins Celebrate Birthday – Without Their Dad

Brooke Mueller with her twins, Max and Bob


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 troubled actor’s boys, Max and Bob who turn 2 on Monday, celebrated at a party Sunday with their mom, Brooke Mueller, and about 50 guests.

“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.


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