Catherine Lisa Bell (born 14 August 1968) is a British-American actress and model known for her roles as Lieutenant Colonel Sarah MacKenzie in the television series JAG from 1997 to 2005, Denise Sherwood in the series Army Wives from 2007 to 2013, and Cassandra "Cassie" Nightingale in Hallmark's The Good Witch films and television series since 2008 to 2021. Among her first parts was serving as Isabella Rossellini's nude body double for the 1992 film Death Becomes Her. In 1994, Bell starred in the Dolph Lundgren film Men of War. While filming the movie in Thailand, Bell and her co-star Trevor Goddard bonded over contracting amoebic dysentery. Goddard would play Bell's off-and-on love interest Mic Brumby the following year on JAG. They remained friends until Goddard's death from a drug overdose in June 2003, an event that the bereaved Bell described as "horrible". Bell played the role of Cassandra "Cassie" Nightingale, the main character of Hallmark's The Good Witch (2008), and its sequels The Good Witch's Garden (2009), The Good Witch's Gift (2010), The Good Witch's Family (2011), The Good Witch's Charm (2012), The Good Witch's Destiny (2013), and The Good Witch's Wonder (2014). She was also a co-executive producer of all of the movies. Bell is fluent in Persian and English. She is fond of motorcycling, skiing, snowboarding and kickboxing. Her hobbies include cross-stitching and making model cars, which she has done since age eight.
