Sasha Alexander (born Suzana Drobnjaković; May 17, 1973) is an American actress.

She played the role of Gretchen Witter, the sister of Pacey Witter on Dawson's Creek, Lucy in Yes Man (2008); and Catherine in He's Just Not That Into You (2009). Alexander also acted as former Secret Service/NCIS Special Agent Kate Todd for the first two seasons of NCIS.

She currently stars as Chief Medical Examiner Maura Isles on the Turner Network Television series Rizzoli & Isles.