Mackenzie Alison 'Mack' Longo.
She is the daughter of Joe Longo and Mel Longo-Burke. She has a twin brother named Zackery Joseph 'Zack' Longo. She is 5 minutes younger then Zack. They both have a older half sister named Daniella Theresa 'Dani' Mancini Longo. Dani is the daughter of Joe and step daughter of Mel.