Kristen Bell delighted fans Tuesday by lip syncing to "Frozen" co-star Idina Menzel.
The clip begins with a closeup of Bell lip syncing to the hit theme song. The camera pans to show Menzel, who starts laughing mid-rehearsal when she sees her co-star recording the video.
"SISTERS. (I [love] u @idinamenzel," Bell captioned the post.
Just Jared reported Bell and Menzel, who voiced Anna's sister, Queen Elsa, reunited to attend the Walt Disney Family Museum's 2017 Fundraising Gala.
Bell and Menzel will reprise Anna and Elsa in the sequel "Frozen 2," which opens in theaters in November 2019.
Bell said in October that she indulged one of her daughters by dressing as Elsa, not Anna, for Halloween.