Sydney Sweeney has hit back at critics who accused her of having a fling with her ‘Anyone But You’ co-star Glen Powell. The ‘Euphoria’ actress, 26, was at the centre of accusations she and the ‘Top Gun: Maverick’ star, 35, were having an affair while they shot the romantic comedy in Australia, and Sydney has now used her opening monologue on ‘Saturday Night Live’ to hit back at the allegations. She said: “The craziest rumour I’ve seen is that while I was filming ‘Anyone But You,’ I was having an affair with my co-star Glen Powell. “That’s obviously not true. Me and my fiancé (Jonathan Davino) …