Break out your tap shoes, Elsa, you’re coming to Broadway!

The Walt Disney Co. held a top-secret reading of the stage version of “Frozen” last week — and word around the Magic Kingdom is that the show has the potential to be a “Lion King”-size blockbuster.

The reading was held at the New 42nd Street rehearsal studio for Disney insiders only. But sources tell The Post that those who loved the 2013 Oscar-winning film will be happy to know the plot line will still hold — Disney’s not about to fix what’s not broken.

They’re bringing back the same husband-and-wife songwriters who did the score for the movie, Kristen Anderson-Lopez and Robert Lopez, to write some new songs. The sources say that at least one of those tunes, “True Love,” is every bit as catchy as “Let It Go” — which every girl in the Western world can sing ad nauseam from the back seat on a long car trip.

And rest assured, Olaf will be there. Costume designer Bob Crowley has yet to sketch out any designs, but the snowman will probably be played by an actor in costume, rather than a big “Lion King”-esque puppet.

Alex Timbers, who staged “Bloody Bloody Andrew Jackson” on Broadway, is directing. The choreographer is Peter Darling, whose credits include “Billy Elliot” and “Matilda.”

There’s no word yet about casting. The reading was a bare-bones affair, with the actors reading from scripts on music stands. Betsy Wolfe played Elsa, Patti Murin played Anna and Okieriete Onaodowan (currently in “Hamilton”) was Kristoff.

Meanwhile, “Frozen” already found its Broadway home: Jujamcyn Theaters, which owns the St. James, is planning a multimillion-dollar renovation of the theater to accommodate the ice castles of Arendelle.

“They’re going to blow out the back wall of the theater to give the stage more depth,” a source says. “There will also be more wing space because the sets are going to be huge.”

Sources say Disney chief Bob Iger, who attended the reading and plans to be heavily involved, was impressed with them all, especially Wolfe, whose rendition of “Let It Go” held its own against Idina Menzel’s.

They also told The Post that “Frozen” will play an out-of-town tryout in Denver next summer before opening in New York in spring 2018.