Charlie Sheen is set to get another family visitor on the set of his hit sitcom TWO AND A HALF MEN - his dad Martin Sheen.

Charlie's estranged wife Denise Richards and their baby daughter SAM have already appeared on the show, and now the actor reveals that his dad has signed up for a guest spot.

He says, "He's gonna do our show, not playing my father, which is funny in itself. He's gonna be somebody's father on the show, one of the co-stars. I don't want to give too much away."

Martin and Charlie Sheen have acted together a handful of times before, including in the 1987 movie Wall Street and the 1990 military drama CADENCE. Martin also made a guest appearance on Spin City during Charlie's tenure on the show.