Charlie Sheen is hoping that the third time's the charm when it comes to marriage.

The "Two and a Half Men" star is engaged to his girlfriend Brooke Mueller, reports People.

The couple first met in June 2006 at the Chrysalis Butterfly Ball in Los Angeles. Sheen, 41, proposed to Mueller, 29, when they were in Costa Rica.

Sheen was married twice previously, first to Donna Peele in the mid-'90s and then to actress Denise Richards, with whom he has two daughters: Lola, 2, and Sam, 3. They were officially divorced last November.

Mueller is a former actress who is now a real estate investor.

Unfortunately for Richards, 36, her own relationship with Richie Sambora, 48, has fizzled.