Genevieve Knight "G" Hannelius (born December 22, 1998)is an American actress and singer. She starred as Avery Jennings in the Disney Channel sitcom Dog with a Blog. Prior to this, she had recurring roles in the Disney Channel series Sonny with a Chance and Good Luck Charlie. She has also starred in Leo Little's Big Show and has done voice work as Rosebud in the Air Buddies films. She also guest starred in Disney Channel's series Jessie.
In February 2011, she was cast for a lead role in the pilot of the High School Musical spin-off series Madison High, however the pilot was not picked up to series. In 2012, she played Avery Jennings on the Disney Channel series Dog with a Blog, it premiered on October 12, 2012. In 2014, she guest starred as Mad Mack on the Disney Channel series Jessie and voiced Lady Joy on the Disney Junior series Sofia the First.