WATCH: Lady Gaga Dancing With John Travolta Leads the Must-See Moments From GRAMMYs After Parties

An eyewitness tells ET that the couple didn't leave each other's side the whole night, but that Carino was sure to let his girlfriend take the spotlight after her big GRAMMYs night.

"There were cute moments of arm in arm and brushing each other's side," the eyewitness adds. "It was minimal PDA, but Gaga was glowing."

WATCH: Lady Gaga Is Dating Her Talent Agent Christian Carino: Pics!

Gaga and Carino recently began seeing each other, a source told ET last week. The two were not shy about sharing their affection at Super Bowl LI, before the 30-year-old singer's incredible halftime show performance.

Of course, the backstage GRAMMYs meetup that had everyone talking was Gaga and Adele!

Watch the video below for their epic Instagram pic.