The cast of CSI: NY just got a little more, ahem, Beautiful.

Kathleen Munroe, late of ABC Family’s Beautiful People, is joining the cast of CSI: NY in the recurring role of Samantha Flack, kid sis to Eddie Cahill’s Det. Flack. “She’s a bad girl,” explains exec producer Pam Veasey. “She’s trouble. It’s a great dynamic.”

Veasey reveals that the role was originally going to be small, but then they met Munroe and “she was so his sister and so authentically New York and so wonderfully young and beautiful and shifty and dangerous that we were like, ‘Oh my God, this is a great opportunity.’ It adds a great human element to Eddie’s character, and [her presence] will touch a lot of other people, including A.J. and Stella.”

Check back later this week for more CSI: NY scoop from Veasey, including what’s ahead for a certain couple whose fans keep threatening me with bodily harm if I don’t tell them something — anything — soon. Good thing I like my body.

Reaction to Munroe’s casting? Was Veasey and her team wise to sign her to a longer-term deal before another show snapped her up? Does the prospect of a more “human” Don sound appealing to you? Weigh in below in the comments section!