Yvonne Strahovski (born Yvonne Jaqueline Strzechowski; 30 July 1982) is an Australian actress. After graduating from the University of Western Sydney, she featured in a number of Australian television shows. She then starred as CIA Agent Sarah Walker in the American television series Chuck, a role for which she is widely known. She is also noted as the voice and model of Miranda Lawson in the Mass Effect trilogy. She is featured in season 7 of the Showtime series Dexter as Hannah McKay.