In February 2006, she starred as Julia Jones in , a parody of romantic comedies.
In 2012, Hannigan reprised the role of Michelle in.
After high school, she attended , where she was a member of the sorority and earned a degree in psychology.
She also provides the voice of Claire Clancy in the animated series 2018—present.
Living with her mother and attending , she successfully auditioned for agents while visiting her father in.
She moved to at age 11.