Marsden and Lisa Linde separated in 2011 after 11 years together, and the X-Men actor reportedly began dating an as-yet-unidentified supermodel very soon after the split — and now she's expecting.
A source told E! News, "A girl he dated after he separated from his wife has told him she is four months pregnant. She is very excited to be a mom."
Marsden, who is already a father to son Jack Holden and daughter Mary James, recently appeared as a guest star on TV's 30 Rock and will next be seen in the Kirsten Dunst Bridesmaids-y comedy Bachelorette, out this September.