William Costa Marsden | Entertainment News, Photos, and Videos

James Marsden holds his precious, five-month-old son William Luca while out on a walk around the neighborhood on Sunday afternoon (May 26) in Los Angeles.

This is the first time we’ve gotten a glimpse at the 39-year-old actor’s adorable baby boy since his December 2012 birth.

PHOTOS: Check out the latest pics of James Marsden

In case you missed it, check out the trailer for James‘ upcoming film The Butler, which hits theaters October 18.

FYI: James is using his Baby Jogger City Mini stroller.

10+ pictures inside of James Marsden and his son William Luca on a stroll together…More Here! »

James Marsden has just become a father for the third time to a newborn baby boy, William Luca Costa-Marsden, according to People!

The 39-year-old actor had a brief relationship with model Rose Costa after splitting from his wife Lisa Linde in 2011.

PHOTOS: Check out the latest pics of James Marsden

The little boy was delivered on Friday (December 14) in Los Angeles.

James has two children with Lisa, daughter Mary James, 7, and son Jack Holden, 11.

Congratulations to James and Rose on the birth of their new son William!