Erika Henningsen is a Bay Area native most known for originating the starring role of Cady Heron in the Tony-nominated hit musical, Mean Girls. Prior to Mean Girls, she played Fantine opposite Ramin Karimloo in the recent Broadway revival of Les Miserables. She made her New York stage debut in the New York Philharmonic production of Show Boat, conducted by Ted Sperling at Alice Tully Hall, which was subsequently released on PBS as part of the Live From Lincoln Center concert series. Other theater credits include Beth in the acclaimed musical adaptation of Barry Levinson's hit movie, Diner, helmed by Kathleen Marshall for Signature Theater in D.C., Nellie Forbush in South Pacific and Sophie in Mamma Mia! at the Pittsburgh Civic Light Opera, as well as Nina in Dear World opposite Tyne Daly. 

Erika has toured the United States with her cabaret show, Raise Your Standards, a celebration of the Great American Songbook, to sold out audiences at Feinstein's in NYC, Indianapolis and San Francisco, and is slated to debut a new solo show with the Virginia Symphony Orchestra in April of 2024. Erika performed a Rodgers and Hammerstein Celebration produced by the estate of Rodgers and Hammerstein at Merkin Hall in New York City. TV credits include CBS’s Blue Bloods, HBO’s That Damn Michael Che, and Tracy Oliver’s original comedy, Harlem, for Amazon. She can be heard as the leading voice actor in Amazon’s upcoming musical animation series, Hazbin Hotel.