Gaga was on Graham Norton’s show to promote her appearance in the upcoming Joker sequel Folie À Deux, in which she puts her own unique spin on the iconic Batman villain Harley Quinn. The chart-topping star shares the screen with Joaquin Phoenix in the new musical, who apparently struggled at first with performing live on the film’s set.

Lady Gaga revealed on 'The Graham Norton Show' that initially thought her fiancé Michael Polansky 'was joking' when he popped the question on April Fool's Day

While on the show, which also featured actors Demi Moore and Colin Farrell, Lady Gaga said, “He proposed on April first and I thought he was joking. Then when we went to the Olympics, we were filmed saying hello to the Prime Minister and I was caught on camera saying, ‘This is my fiancé.’ I had wanted to keep it a secret!”