Matthew Bellamy, Kate Hudson

Kate Hudson and fiancé Matthew Bellamy welcomed a baby boy Saturday, her rep confirms.

The actress, 32, gave birth in Los Angeles late Saturday, according to UsMagazine.com, who first reported the news. The name of the child, the couple's first, is not yet known.

Kate Hudson is engaged

The baby boy joins big brother Ryder, 7, from Hudson's first marriage to Black Crowes singer Chris Robinson.

Hudson and Bellamy, 33, began dating in spring 2010 and news broke of her pregnancy in January. In late April, Hudson announced her engagement to the Muse rocker on the Today show.

Hudson most recently starred in Something Borrowed.