Demi Lovato to Play Schizophrenic Patient on Grey’s Anatomy

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New guy, new gig.

Demi Lovato — who recently admitted she's dating Joe Jonas — will guest star on Grey's Anatomy, she confirmed on Twitter Monday.

PHOTO: Demi and Joe on the red carpet at the Nickelodeon's Kids' Choice Awards

The Disney star will play a schizophrenia patient who gets treated by Karev (Justin Chambers) and Arizona (Jessica Capshaw). Her episode airs in May.

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"Demi Lovato's on the Grey's set filming her guest spot. Everyone's super excited around here," Twittered series creator Shonda Rimes.

Added Lovato, "Mr. Patrick Dempsey himself wants me to give a shoutout to you guys! hahahaha so awesome."

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Earlier Monday, she wrote, "I'm so thrilled to announce that this week I'm shooting Grey's Anatomy!!!!!!!! 😀 AHHH!!!!"

She Twittered Sunday night that taping the guest spot was "fulfilling one of my biggest dreams."

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