Yvonne Jaqueline Strzechowski (born 30 July 1982), known professionally as Yvonne Strahovski (), is an Australian actress. She is best known for her roles as CIA Agent Sarah Walker in the NBC spy drama series Chuck (2007–2012), Hannah McKay in the Showtime drama series Dexter (2012–2013), and CIA Agent Kate Morgan in the Fox event series 24: Live Another Day (2014). She had a supporting role in The Guilt Trip (2012).
