Backstage on Broadway: Today’s special! Sara Bareilles, Jessie Mueller serve up new musical ‘Waitress’

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“I drank the Kool-Aid on this show," Sara Bareilles laughed. "I eat, sleep, breathe, and dream Waitress.”

Sara Bareilles can't get enough of her latest project, fulfilling a lifelong dream.

“It’s a very proud moment for me, obviously my Broadway debut,” she said.

The 5-time Grammy nominee wrote the music and lyrics for the show Waitress.

“I got invited to a meeting with the Diane Paulus, the director and I just moved to New York, it felt like this good omen,” she explained of why she decided to do this project.

The new musical is based off the hit indie movie.

“Which was brave and feminist and eccentric and strange and heartfelt and messy and it was just all of these wonderful human qualities,” Bareilles said.

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“I was like that seems totally up my alley, so when I heard they were doing a musical of it that got me really excited,” Jessie Mueller smiled.

The show stars Tony-Award winner, Jessie Mueller.

“I thought at the time I want to do this, I heard the music and I had an emotional reaction right away,” Mueller remembered.

She plays Jenna, a pregnant waitress trapped in an abusive relationship who copes by finding happiness in baking unusual pies.

“Oh a happiness pie, when I think of happy I think lemons and yellow, so I guess a lemon cream sort of something with lots of whipped cream on top!” Mueller smiled.

The show definitely serves up some great numbers but it also has a very meaningful purpose.

“To preserve the legacy and the intention of Adrienne Shelly who wrote and directed the film," Bareilles said. "She’s no longer with us so our feeling was very protective about wanting to honor her in that way.”

Some of the show's songs are already getting lots of play, as Bareilles recorded and released them on an album in November.

“To have the score already somewhat familiar to an audience is really exciting and I’m hoping that it invites a new audience to see the theater," she smiled.

Waitress is currently in previews at the Brooks Atkinson Theatre and officially opens on April 24th.