Donna Lynne Champlin is an American actress. In 1994, she made her New York stage debut in a concert version of Very Warm for May at Carnegie Hall and later her Broadway debut in James Joyce's The Dead. She went on to perform in shows including Billy Elliot the Musical and a Broadway revival of Sweeney Todd. She also appeared in the TV movie By Jeeves and the film Feel the Beat alongside Sofia Carson. However, she may be best known for her role in the TV series Crazy Ex-Girlfriend with Rachel Bloom.