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 Chief Medical Examiner Maura Isles on the Turner Network Television series Rizzoli & Isles.
Alexander was born Suzana S. Drobnjaković (Serbian Cyrillic: Сузана С. Дробњаковић) in Los Angeles, California, to a Serbian mother and an Italian father . She began acting in school productions in the seventh grade. She also was an ice skater but had to stop due to a knee injury. She continued acting through high school and college, and then moved to New York to act in summer stock and Shakespeare festivals. She graduated from the University of Southern California's School of Cinema-Television before going on to have a successful acting career in both TV and film.