Rhea Durham, Mark Wahlberg and daughter Ella
09/01/2009 at 02:00 PM EDT
It appears as though there are no shortage of reasons for Mark Wahlberg and Rhea Durham to celebrate.
Fresh on the heels of their Aug. 1 wedding
, Durham was spotted on Sunday at The Grove in Los Angeles sporting quite the baby bump. Though no official announcement has been made, a source says the couple are expecting their fourth child.
Already parents to Ella Rae, who is about to turn 6, Michael, 3, and Brendan Joseph, 11 months, the couple have made no secret of their desire for a big family.
Last summer, Wahlberg – 38-year-old executive producer of HBO's Entourage
that "when the kids are good, we want eight or nine." He went on to call life in a full house "hectic ... but a lot of fun."
The actor's rep did not respond to requests for comment.
Next up for Wahlberg is the Peter Jackson-directed feature film The Lovely Bones
opposite Rachel Weisz, in theaters on Dec. 11.