Demi Lovato will go to “the dark side” on “Glee.”

Naya Rivera revealed that Lovato will date her character Santana and will be making her debut in a Beatles-themed episode.

“She’s playing my love interest, so I’m very excited about that” Rivera told MTV at the “Video Music Awards.” “We’re bringing her to the dark side.”

The pop star and “X Factor” judge confirmed this week that she’d be joining the cast when she tweeted: “Wayyyyy too excited to be starting @GLEE this week!!!!!!!”

Season 5 of “Glee” premieres September 26.