Kelli Christine O'Hara (born April 16, 1976) is an American actress and singer.
She has appeared on Broadway and Off-Broadway in many musicals since making her Broadway debut as a replacement in Jekyll & Hyde in 2000.
She has also acted on television, film and opera, appearing with The Metropolitan Opera.
In 2018 she made her West End debut.
O'Hara has received seven Tony Award nominations, first for Best Featured Actress in a Musical for the 2005 production of The Light in the Piazza.
Her subsequent nominations include The Pajama Game (2006), South Pacific (2008), Nice Work If You Can Get It (2012), The Bridges of Madison County (2014), and Kiss Me, Kate (2019), winning Best Actress in a Musical in 2015 for her performance as Anna Leonowens in The King and I.She has also played roles in television series, such as Masters of Sex and 13 Reasons Why, receiving a Primetime Emmy Award nomination for her starring role in the 2017 web drama series The Accidental Wolf.
She has appeared in films, such as Sex and the City 2, and operas, such as The Merry Widow and Così fan tutte.