She is the daughter of actress Julie Payne and Robert Towne, an Oscar-winning screenwriter, director, and actor. She is currently married to Charlie Hunnam.
Towne's career began with a small role in the 1998 movie Girl. She then appeared in Go, She's All That (which co-starred Sarah Michelle Gellar), But I'm a Cheerleader (which co-starred Clea DuVall), What Lies Beneath, and The Bachelor.
- Katharine Towne at the Internet Movie Database