Sara Bareilles is set to join the cast of Broadway's "Waitress: The Musical."

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The singer-songwriter is to begin her 10-week run on March 31.

She made the announcement while wearing a waitress uniform and "Jenna" nametag in a brief video released on social media Thursday.

The recording artist wrote the music and lyrics for the show about a pregnant, small-town pie baker, who is trapped in a dead-end marriage and falls in love with her obstetrician.

The stage musical, which opened on Broadway last year, is based on a 2007 movie starring Keri Russell, Jeremy Sisto and Nathan Fillion.

Jessie Mueller originated the role of Jenna in the Broadway production of "Waitress."