- Early life
Cassidy was born in Los Angeles, California, daughter of '70s pop idol David Cassidy and former model Sherry (now Sherry Benedon); the two had an "on-again, off-again" relationship during the 1980s and were never married. Cassidy's paternal grandparents were actors Jack Cassidy and Evelyn Ward. She grew up in Calabasas, California with her mother and stepfather, Richard Benedon, whom she considers her father. She has two half-sisters, Jenna and Jamie. As a child, Cassidy took to tumbling and eventually became a cheerleader for the California Flyers, a competitive team. She cheered as a freshman for Calabasas High School where she attended classes. As a teenager, Cassidy became interested in show business.
Cassidy started doing theater when she was in elemantry school. She modeled for Abercrombie and Fitch and Guess?'s Rock and Republic line in 2004. She reportedly has plans to continue her modeling in the future. Modeling helped open the door to Cassidy's acting career. She landed a number of jobs, including a recurring role as Zoe on 7th Heaven, where she has appeared several times. Following that, she appeared in the one-hour drama, Sex, Love & Secrets but the series was cancelled after a few episodes. Her 2006 projects included a small role in the horror remake When a Stranger Calls. She has also starred in another horror remake, the murderous Christmas classic Black Christmas.
Was filming scenes at a college for the movie Revenge of the Nerds but production was halted when Agnes Scott College backed out of its agreement. It eventually stopped the filming and production and the movie has been canned. She just began filming in paris where shes shooting a Liam Nession film called "Taken". She is scheduled to star in the remake of the hit television series Dallas as Lucy Ewing beating out Lindsay Lohan and Jessica Simpson. Filming for Dallas is scheduled to begin in the spring of 2007.
Katie is currently dating Jesse McCartney.