Sutton Lenore Foster is an American actress. She is known for her work on the Broadway stage, for which she has won the Tony Award for Best Actress in a Musical twice, in 2002 for her role as Millie Dillmount in Thoroughly Modern Millie, and in 2011 for her performance as Reno Sweeney in Anything Goes, a role which she reprised in 2021 for a production in London and for which she received a nomination for the Laurence Olivier Award for Best Actress in a Musical. Her other Broadway credits include Grease, Little Women, The Drowsy Chaperone, Young Frankenstein, Shrek the Musical, Violet, The Music Man, and Sweeney Todd: The Demon Barber of Fleet Street. On television, Foster played the lead role in the short-lived ABC Family comedy-drama Bunheads from 2012 to 2013. From 2015 to 2021, she starred in the TV Land comedy-drama Younger.

The Tony Award for Best Performance by a Leading Actress in a Musical is awarded to the best actress in a musical, whether a new production or a revival. The award has been given since 1948, but the nominees who did not win have only been publicly announced since 1956.