No shocker here, given that Frozen is now the most successful animated film of all time: Disney plans to cash in on Frozen fever at its theme parks this Christmas. The frosty world of the 2013 hit film will play a big part in the park's annual holiday events, from turning Cinderella's Castle into an ice palace to actor Jonathan Groff, the voice of mountain man Kristoff, stepping in as one of the celebrity narrators for Epcot's candlelight retelling of the Christmas story. Starting Nov. 5, Queen Elsa and the park's special effects wizards will use their powers to transform the castle at Magic Kingdom into a glistening ice palace every night, and Frozen characters will join Magic Kingdom's Christmas parade. Over at Hollywood Studios, the summer sing-along and snow play area are now on the "continuing indefinitely" list of daily attractions. And at Epcot, where the Candlelight Processional is one of the most popular holiday traditions, Groff will narrate the Christmas story Dec. 3-5, accompanied by a 50-piece orchestra and mass choir. Find information at disneyworld.disney.go.com. — Sharon Kennedy Wynne, Times staff writer