File photo of the couple Charlie Sheen (R) and his wife Brooke Mueller (Xinhua/Reuters File Photo)

Charlie Sheen, the focus of many recent public controversies, was off the guest list of in his twin son's second birthday party, according to foreign media report Monday.

The twin's party was hosted on Sunday by Sheen's ex-wife Brooke Mueller in Rick and Kathy Hilton's mansion in Bel Air, California.

Guests who attended the party included celebrities such as Nicky Hilton, David Katzenberg and Adrienne Maloof.

The party, according to a guest, was a casual and child-friendly celebration. In the backyard decorated with a big bounce castle and tons of balloons, the twin sons were bouncing around and opening presents.

"They seem to be having a great time. So is Brooke," said the guest.

An insider told security guards were set at the entrance to ensure no "uninvited guests" showed up at the party, that there were no signs of Sheen's coming.

Meanwhile, Sheen is busy plotting out additions to his "Charlie Sheen: My Violent Torpedo of Truth/Defeat" tour after selling out dates in Chicago and Detroit in 18 minutes.

Sheen has recently missed the birthday parties of three children. He was also absent from his daughter's party, which was hosted immediately after the twin's celebration.