James Marsden and Brazilian model, Rose Costa, welcomed a baby boy last Friday Dec. 14 in L.A.
The child, named William Luca Costa-Marsden, was the result of a rumored one night stand in Miami last spring between the recently single James and the coupled up (but now single) Rose.
This is the first child for the model, but the third for James who is also father to daughter Mary and son Jack from his previous marriage to Lisa Linde.
Mary, Jack and William — what traditional names, right? A source tells PEOPLE it was James who chose the name William Luca.
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