Sasha Alexander (born May 17, 1973) is an American actress. She is known for several roles, including: Gretchen Witter, the sister of Pacey Witter on Dawson's Creek; NCIS Special Agent Kate Todd in the first two seasons of NCIS; as Lucy in Yes Man (2008); and as Catherine in He's Just Not That Into You (2009). She currently stars as Medical Examiner Maura Isles on the new Turner Network Television series Rizzoli and Isles.
Alexander was a regular on two short-lived series: the medical drama Presidio Med and ABC's twenty-something drama Wasteland. She achieved widespread media attention and critical praise when she appeared on the fourth season of Dawson's Creek as Gretchen Witter, dating the title character, and in an episode of the short-lived Fox comedy series Greg the Bunny, playing the part of a lesbian TV Guide reporter and shared an onscreen kiss with Sarah Silverman. Alexander has also appeared in the films Lucky 13, and All Over the Guy as well as He's Just Not That Into You, the independent movie Last Lullaby, and Yes Man starring Jim Carrey.
Before being cast as Caitlin Todd on NCIS, she appeared on CSI as District Attorney Robin Childs, in the episode, "Alter Boys". Her role on NCIS ended in May 2005 and she had a small role in 2006's Mission Impossible III.
She joined the cast of The Nine in the role of Nick's ex-wife. She also appeared in one episode of Friends ("The One with Joey's Interview"), playing a Soap Opera Digest reporter who interviewed Joey.
Her current television role is that of Boston medical examiner Maura Isles on the new TNT series Rizzoli & Isles, which debuted on July 12, 2010.
