Catherine got engaged to Michael Douglas on 31 December 1999 at Aspen, Colorado. The two got married on 18th November 2000 in the Terrace Room of the legendary Plaza Hotel in New York.

Catherine was born in Swansea but grew up in the small seaside town of Mumbles in Wales. As a child, she was exposed to a virus that gave her breathing difficulties. This required a tracheotomy surgery, which ultimately left a surgical scar on her neck.

The Friday Night Project" playing "Herself" (archive footage) (episode # 1.6) 18 March 2005 "This Morning" playing "Herself" 2 February 2005 "The Tonight Show with Jay Leno" playing "Herself" 8 December 2004 "HBO First Look" playing "Herself" in episode: "Ocean's Twelve" 2 December 2004 "Rove Live" playing "Herself" (episode # 5.41) 23 November 2004