Us Weekly: Mark Wahlberg and his wife Rhea Durham are expecting their fourth child, Usmagazine.com has confirmed.

Durham, 31, showed off her growing bump during a weekend shopping trip to The Grove in L.A.

The two -- who are already parents to Ella Rae, 5, Michael, 3, and Brendan Joseph, 11 months -- tied the knot in a private Catholic ceremony on Aug. 1 in Beverly Hills.

Wahlberg, 38, has credited Durham and their children with helping him shake his former bad boy ways.

"We continue to grow in our relationship," he told Us last July. "I was not prepared to be married ... when I was 20 or 30. Committing to making it work and all the other things that go into building a solid foundation is where I'm at now."

He says he works hard to balance work and family.

"My family travels with me when I work most of the time or I go back and forth on the weekends," he has said. "I've been pretty consistent about just making phone calls in the morning and then chasing the kids around in the afternoon."

He next stars in The Lovely Bones, out Dec. 11.

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