By Madeline Raynor
November 14, 2016 at 04:12 PM EST

Once a Treblemaker, always a Treblemaker.

Pitch Perfect actors Skylar Astin and Ben Platt had a college a cappella reunion backstage at Broadway’s Dear Evan Hansen, which Platt headlines.

The two played roomies at Barden University and fellow a cappella stars in the 2012 film. On Sunday, Astin caught an early performance of the show, which starts previews Monday. Astin posted a snapshot of him and his mom outside the Music Box Theatre on Instagram, writing “Proud brother tonight.” He also posted a backstage selfie with Platt, writing, “My roomie for life is a revelation in his new show. I am kvelling. Run to see him in #dearevanhansen and #youwillbefound.”

Dear Evan Hansen features music from writing team Benj Pasek and Justin Paul (La La Land, A Christmas Story) and starts previews Monday.