Charlie Sheen wasn't invited to his twin sons' second birthday party yesterday (13.03.11).

The former 'Two and a Half Men' actor's estranged wife Brooke Mueller held a lavish bash for Bob and Max - who turn two today (14.03.11) - at Paris Hilton's family home in Bel Air, California, and while guests included Nicky Hilton and boyfriend David Katzenberg and reality TV star Adrienne Maloof, the boys' dad was noticeably absent.

A source said: "Brooke seemed to have a good time too and was relaxed and happy. She seemed focused on her kids and nothing else. There was a lot of security outside at all times to make sure no uninvited guests got in. There was no sign of Charlie at the party."

The party - which was attended by around 60 guests - featured a red, yellow and blue colour scheme, balloons and a big bounce castle, while partygoers were treated to Chinese chow mein and salad followed by chocolate cake.

Another source said: "The party was a casual and child friendly Celebration. It's all about Max and Bob and their friends. They seem to be having a great time, and so is Brooke." 

Meanwhile, Charlie - who agreed a custody deal with Brooke last week- is set to add more dates to his 'Charlie Sheen LIVE: My Violent Torpedo of Truth/Defeat is Not an Option' tour after the two shows sold out within 18 minutes.

Following the news he tweeted: "Fastball; Detroit/Chicago sold out in minutes... Thanks to Sheen's Cadre..! #WINNING c (sic)"