The 30 Rock star is expecting the child with a model he dated shortly after he split from wife Lisa Linde last fall, according to E!. The New York Post identifies the woman as 24-year-old Brazilian model Rose Costa.
James Marsden's wife files for divorce
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 and daughter Mary James.