Singer Ariana Grande and Sen. Bernie Sanders exchanged messages via social media Wednesday after the senator took photos with the pop star backstage at her Atlanta concert Tuesday night. 

Grande let her excitement show, proclaiming her support for the Vermont senator, as well as pushing her efforts to register as many voters as possible. 

"MY GUY. thank you Senator Sanders for coming to my show, making my whole night and for all that you stand for !" Grande tweeted. "@headcountorg and i are doing our best to make you proud. we've already registered 20k+ young voters at my shows alone. also i will never smile this hard again promise."

Sanders, who has garnered high polling numbers with young voters since his 2016 presidential run, returned a kind message to the singer, thanking her for her previous work and calling on others to join similar causes.

"I want to thank @ArianaGrande for not only being a wonderful entertainer, but also for being such an outstanding advocate for social justice," Sanders tweeted Wednesday. "We must all be prepared — like Ariana has shown — to fight for everyone who is struggling. It was great to meet her in Atlanta last night."

This encounter is not the first time Sanders has received praise from Grande. While teasing her remix of Lizzo's hit "Good as Hell," Grande tweeted a lyric from the song, "baby how u feelin." The senator promptly responded to the tweet with "Ready to fight for Medicare for All," which, in turn, left Grande "screaming."

Sanders was in Atlanta a day early to prepare for the Democratic primary debate, which is scheduled to take place Wednesday night at Tyler Perry Studios. It will be available for streaming on MSNBC and