Mark Wahlberg to become a dad again?

Mark Wahlberg's fiancée is reportedly pregnant with the couple's third child.

The actor is said to be "thrilled" after learning that model Rhea Durham, 29, is expecting a son in September.

The pair, who have been dating since 2001, are already parents to four-year-old daughter Ella Rae and son Michael, two.

A source told OK!: "Mark is thrilled to be having another baby. He is an amazing dad, and his two children are his world. He always used to joke about wanting at least a dozen kids, but it looks like he wasn't joking after all."

Wahlberg, 36, is currently filming video game adaptation Max Payne alongside Mila Kunis and Beau Bridges.