Her children's birth father is Des Styles. She divorced him when Gemma was 10 years old and Harry was 7.
She is a philanthropist who frequently advocates for a charity called Believes in Magic.
She was born to Mary and Brian Selley. She married Robin Twist on June 1, 2013 with Harry as the best man and Gemma as the maid of honor.
Her son, Harry, performs alongside Louis Tomlinson in One Direction.