Kristen Bell surprised fans at a Frozen pajama party sing-along at LA’s El Capitan Theatre.

Kristen Bell Introduces Frozen Sing-Along

Bell, who voiced Frozen’s main protagonist, Anna, helped kick off the sing-a-long event on Friday, Aug. 22, when she introduced the first screening of the sing-along’s limited run. El Capitan Theatre will be hosting Frozen Sing-Along screenings until Sept 7, with pajama parties on Fridays and Saturdays at the 4 p.m. and 7 p.m. screenings.

Bell teased her Twitter followers that she would be attending the event in a tweet on Aug. 18, and she followed through.

.@elcapitanthtre #Frozen Sing-A-Long & Pajama Party? Yes pls! Maybe I’ll stop by on opening night! (Aug 22) #idefinitelywill #seeyathere

— Kristen Bell (@IMKristenBell) August 18, 2014

Bell introduced the film to a theater full of small fans, getting up on stage alongside women dressed up as Princess Anna and her sister, Queen Elsa. The production even included some fake snow.

Guest getting to meet @IMKristenBell at #ElCapitanTheatre on Opening Day! Thank you to all guests that came! #Frozen pic.twitter.com/z3XFmkQ1AH

— El Capitan Theatre (@ElCapitanThtre) August 23, 2014

Bell also posed for photographs with fans at the event, and spoke with EW before taking the stage.

“It’s especially invigorating because music is what brought me to performing and acting in general. From doing so much non-singing work and being satisfied with that to have it then be able to reincorporate music into what you do as a performer – which is hopefully tell a good story – it feels weirdly full circle. To be able to do it is one thing, to be hired to do it is really lucky,” Bell, who was trained as a singer before transitioning into acting, told EW.

Disney will release a Frozen Sing-Along DVD on November 18.