High Quality Content by WIKIPEDIA articles! Ellen Travolta (born October 6, 1940) is an American actress, the eldest sibling of John Travolta. She is probably best known for her portrayal of Louisa Arcola Delvecchio, the mother of Chachi Arcola (Scott Baio) in the 1950s-based sitcom Happy Days, and its unsuccessful spinoff, Joanie Loves Chachi. She also played mother to Scott Baio on Charles in Charge from 1987 to 1990.