Barry Watson, Natasha Gregson Wagner Expecting a Baby!

Barry Watson and Natasha Gregson Wagner Credit: Michael Tran/FilmMagic; John Shearer/WireImage

Barry Watson's in 7th Heaven once more!

The reason? He and partner Natasha Gregson Wagner are expecting their first child together, a rep for Watson confirms to Us Weekly.

This will be the Samantha Who? star's first child; Watson, 38, is already a father to Oliver, 7, and Felix, 4, with Extreme Makeover: Home Edition's Tracy Hutson.

Wagner is the daughter of the late actress Natalie Wood, with Wood's second husband, Richard Gregson; when her mother married Robert Wagner in 1972, she added his last name to her own. (Wood died mysteriously during a 1981 boat trip at the age of 43, though her death was later ruled an accident.)

Watson is a cancer survivor; the actor, who had Hodgkin's lymphoma, announced in April 2003 he was in remission.

"I'm a real stubborn person," Watson told Extra in 2006 about his recovery from the illness. "Nobody is going to tell me I'm going anywhere until I'm ready . . . I said, 'I know I'm going to be fine. I know I am.'"

Added Watson, "I really, really feel blessed and really lucky. Things are happening the way they are happening."