Idina Kim Menzel (/ɪˈdiːnə mɛnˈzɛl/ ih-DEE-nə men-ZEL; née Mentzel; born May 30, 1971) is an American actress, singer and songwriter. Regarded as the "Queen of Broadway", Menzel is known for her commanding stage presence, powerful mezzo-soprano voice, and reputation as one of the most influential stage actors of her generation. Having achieved mainstream success across stage, screen, and music, her accolades include a Tony Award and a Daytime Emmy Award.

Menzel rose to prominence as a stage actress in 1996, making her Broadway debut as performance artist Maureen Johnson in the rock musical Rent, for which she earned a Tony Award nomination for Best Featured Actress in a Musical. In 2003, she originated the role of Elphaba in the musical Wicked on Broadway, for which she won the Tony Award for Best Actress in a Musical. After leaving the show in 2005, she reprised the role in the musical's original West End production in 2006, becoming the highest-paid actress in West End theatre history. In 2014, Menzel returned to Broadway in the musical If/Then, for which she received a third Tony Award nomination.