The A Star is Born co-stars sang the film’s track “A Star is Born” at the 91st Academy Awards, making for one of the night’s more memorable moments.

Gaga – who won Best Original Song – was seated at a piano, while Cooper sat opposite her. Soon enough, Cooper moved to sit next to the pop star, with the pair staring intensely into each other’s eyes as the track came to a close.

Following the performance, Gaga posted a photo of the moment on Instagram, writing alongside the picture: “Nothing could be more special than sharing this moment at the Oscars with a true friend and artistic genius.”

The duo received a standing ovation from the crowd for the performance, although The Independent‘s music critic was less impressed.

“There could be 100 people in a room, and only one of them is singing off key, and that’s Bradley Cooper,” Alexandra Pollard wrote. ”Actually, Lady Gaga also had a few wobbly moments performing her and Mark Ronson’s song. She brought it back with a vengeance for the song’s climax, though, after which Cooper came and sat uncomfortably close and ruined it again.”

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Winners at this year’s ceremony included Olivia Colman for The Favourite, Rami Malek for Bohemian Rhapsody, Regina King for If Beale Street Could Talk and Mahershala Ali whose film Green Book won Best Picture. Alfonso Cuarón took home Best Director for his Netflix drama Roma.