She provided the voice of Anna in the 2013 Disney animated feature film Frozen, and has since reprised the role in most of the character's subsequent appearances. She also voiced Hiromi in the 2003 English dub version of Studio Ghibli's The Cat Returns, and also appeared in Lady Gaga & the Muppets' Holiday Spectacular in 2013. She also starred in the Touchstone Pictures films When in Rome as Elizabeth "Beth" Martin, and You Again as Marni Olivia Olsen in 2010. She also appeared as herself in the Liv & Maddie episode "Ask Her More-a-Rooney", and voiced Priscilla in the 2016 animated film Zootopia.
She is married to Dax Shepard, with whom she has two daughters named Lincoln and Delta.
- Both Kristen and Idina Menzel (who voices Anna's sister Elsa in the 2013 film Frozen) auditioned for the role of Rapunzel in the 2010 film Tangled. The role eventually went to Mandy Moore, but Bell's audition helped her get the role of Anna.
- When given the role of Anna, Kristen was able to make several changes, including the dialogue Anna said when meeting Hans to reflect what Kristen would say in real life.
- One of the reasons Bell was cast as Priscilla in Zootopia, may be her love for sloths. She discussed on Ellen how she had a melt down of joy when she got to interact with one for her birthday.