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

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 hit the red carpet in London alongside her fiancé, Michael Polansky, on Wednesday, September 25, to promote new movie Joker: Folie à Deux. The "Die With a Smile" singer wore a vibrant, floor-length red gown custom-made by Celine by Hedi Slimane to the premiere in London's Leicester Square.