Actress Demi Harman has announced the arrival of her first child with husband Andrew Brooks.The Home and Away star shared the exciting news in a joint post on Instagram with her TV producer husband. They both shared a black and white photograph of the newborn boy and also revealed his name.The 30-year-old new mum said: "Meet Beau Thomas Brooks! Coming in at 9lbs13.5oz, 21.5 inches tall.