Ariana Grande is the greatest fan of her Broadway lover Ethan Slater.

The God is a Woman singer was in the audience for the first preview performance of Broadway’s Spamalot revival on Tuesday at the St. James Theatre in New York City, cheering on her boyfriend, who plays The Historian/Prince Herbert.

According to an Instagram video posted by attendee Jim Glaub, the Grammy-winning singer and the rest of the audience gave a standing ovation as colorful confetti showered down on them.

According to People Magazine, Grande, who grew up in the theater, has been a “big supporter” of the performance and “already has plans to go again.”

“She was so sweet last night, taking pictures with fans and gushing about how much she was enjoying the performances,” a source told CNN. “She’s a theatre kid at her core, so you see she really feels at peace being around Broadway.”

The Side to Side singer arrived with her brother Frankie Grande and best friend Doug Middlebrook, with whom she was subsequently photographed exiting the venue.

During the occasion, she also took a selfie with Victorious co-star and long-time friend Liz Gillies.

Grande, 30, and Slater, 31, met on the set of the upcoming Wicked musical adaption and announced their romance in July, after the former divorced from husband Dalton Gomez and the latter divorced from wife Lilly Jay.