30 Rock's James Marsden Welcomes Baby Boy

<img align="left" border="0" src="http://static.tvguide.com/MediaBin/Content/121217/News/3_wed/thumbs/121219james-marsden1_210x305.jpg" width="210" height="305" alt="James Marsden | Photo Credits: Alberto E. Rodriguez/Getty Images" style="margin:0 5px 5px" />

Criss and Liz Lemon may not have a baby yet, but James Marsden does!

The 30 Rock star welcomed his third child last week, People reports.

Rose Costa, whom Marsden previously dated after splitting from wife Lisa Linde in 2011, gave birth to William Luca Costa-Marsden on Dec. 14 in Los Angeles.

James Marsden is going to be a dad again

Linde filed for divorce from the X-Men star in September 2011. The two were married for 11 years and have two children together, son Jack Holden, 11, and daughter Mary James, 7.

In a case of art possibly imitating life, Marsden's 30 Rock character is trying to have a baby with his not-so-blushing bride Liz (Tina Fey).

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