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Sophie Ellis Bextor is expecting her third child with husband Richard Jones.
The brother or sister for Sonny (7) and Kit (2) is due in the spring of 2012 - and Sophie announced the news by Twitter.
She tweeted: "I have something to tell you . I am having another baby. Due in Spring. A little brother or sister for Sonny and Kit. Family e-b-jones are happy and excited. Xx"
However Sophie shows no sign of slowing down just yet.
She added: "Thanks guys. It's a lovely thing. By the way, work on album 5 continues as usual. In fact, I now have a deadline! In the studio as we speak."