03/09/2007 at 03:00 PM EST
star Mark Ruffalo and his wife, Sunrise Coigney, are expecting their third child, a representative confirms to PEOPLE.
When his new movie premiered in Hollywood March 1, the actor, 39, told PEOPLE that he longed for another child
to fill out his brood, which already includes son Keen, 5, and daughter Bella, 1.
"I wouldn't be surprised if that doesn't happen real soon," he said. "We're seriously in heaven with the kids."
Columnist Liz Smith was the first to report the pregnancy.
Asked about the best thing part of fatherhood, Ruffalo said, "It's all the sweet, gentle things that they bring to your life – and their innocence."
Ruffalo, 39, and Coigney, 34, owner of the L.A. boutique Kaviar and Kind, wed in 2000.
The actor struggled for years to break into show business, working L.A. restaurants and taking bit parts before earning a lead role in 2000's You Can Count on Me.
He is currently in Europe shooting The Brothers Bloom
with Adrien Brody and Rachel Weisz.