Jen Taylor (born Jennifer Lee Taylor; February 17, 1973) is an American voice actress. She portrayed Tomiko in Aliens versus Predator 2.

Taylor is best known for voicing Cortana in the Halo franchise since 2001, the eponymous virtual assistant on the Windows Phone introduced in 2014, and Princess Peach in the Mario franchise since 2000. She also appears in Dota 2 (2013) and Destiny (2014), and stars as Kat Cassidy in Kat vs. since 2019.

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