Charlie Sheen on stage at the 63rd Primetime Emmy Awards in Los Angeles this week. REUTERS/Mario Anzuoni

Charlie Sheen and Warner Bros are close to a settlement on the actor's $100 million lawsuit against the studio over his firing from "Two and a Half Men," a source with knowledge of the situation said today.

Sheen sued Warner Bros in Los Angeles Superior Court earlier this year and the case has been in arbitration between the two sides.

A Warner Bros spokesman said no final deal has been reached and declined to comment further.

Sheen's lawyer was not immediately available to comment.