Alasdhair Willis and Stella McCartney Alasdhair Willis and Stella McCartney

Designer Stella McCartney and her husband welcomed their fourth child last week, E! Online reports.

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The 39-year-old daughter of Paul McCartney gave birth to a girl, named Reiley, on Nov. 23 in London. She weighed in at 8 pounds even.

McCartney and her husband, British publisher Alasdhair Willis, already have two sons, 5-year-old Miller Alasdhair James and 2-year-old Beckett Robert Lee, and a 4-year-old daughter, Bailey Linda Olwyn. The couple have been married since 2003.