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Kate Hudson and Matthew Bellamy welcome a son

Kate Hudson attends Chanel's benefit dinner for the Natural Resources Defense Council's Ocean Initiative on June 4, 2011, in Malibu, Calif. Getty

(CBS) Kate Hudson has a new man in her life.

The actress and her fiance, Muse frontman Matthew Bellamy, welcomed a "healthy baby boy" on Saturday in Los Angeles, her rep told People magazine.

Pictures: Celebrity babies

No name has been released.

According to Us magazine, Hudson sent an email to friends announcing the birth, in which she revealed that the baby weighed in at 7 lbs. 12 oz., and asked that "celebration trees" be planted via Barcham Trees in lieu of gifts. She also reportedly asked for tree-plantings instead of gifts at her baby shower last month.

Hudson, 32, and Bellamy, 33, announced in January that they were expecting a baby together. They got engaged in April.

Hudson also has a 7-year-old son, Ryder, from her marriage to Black Crows frontman Chris Robinson. This is Bellamy's first child.