Yvonne Jaqueline Strzechowski (born 30 July 1982), known professionally as Yvonne Strahovski (/strəˈhɒv.ski/), is an Australian actress. She is known for portraying CIA Agent Sarah Walker in the NBC television series Chuck (2007–2012)[2] and Hannah McKay in the Showtime series Dexter (2012–2013). She is also known for her roles in the action adventure film Lego: The Adventures of Clutch Powers (2010) and the fantasy action film I, Frankenstein (2014), is the voice and model of Miranda Lawson in the Mass Effect video game series, and appeared as CIA agent Kate Morgan in 24: Live Another Day. She also voiced Batwoman in the Batman: Bad Blood animated film.