British pop star Kimberley Walsh is a first-time mother after giving birth to a son.

The former Girls Aloud singer welcomed a boy named Bobby on Thursday (04Sep14). He is the star's first child with her longtime partner Justin Scott, a former member of U.K. boyband Triple 8.

Walsh announced the news in a post on Twitter.com on Friday (05Sep14), writing, "Our beautiful baby boy Bobby arrived yesterday afternoon 04/09/14 he's perfect."