The native New Yorker moved to Los Angeles for college but almost gave up acting because of the strenuous and physical demands in Hollywood. But things changed after Spiro was hired for a part on the show Maybe This Time in 1995. Spiro continued with anonymous TV guest spots until she landed a regular role playing Annette O'Toole's daughter on the action-adventure series The Huntress. In 2005, she turned heads with a scene-stealing performance as a dull-witted party girl in the big-screen romantic comedy Must Love Dogs. The next year, Spiro snagged her breakthrough role as a sports writer/tomboy looking for love on the sitcom My Boys.
- Realized a desire for acting as a young teen while watching old movies with her father but avoided participating in high school productions.
- Studied acting at the Circle in the Square Theatre School in New York City and the Odyssey Theatre in Los Angeles.
- Knew little about sports when cast as tomboyish Chicago sports reporter P.J. Franklin in the sitcom My Boys.
- 2018, Sundance Film Festival — NEXT Innovator Award: Winner
- Attended Royal Academy of Dramatic Art, London, England
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