Sydney Sweeney’s grandparents think she has the ‘best t*** in Hollywood’. The 24-year-old actress stars as Cassie Howard in HBO teen drama series Euphoria and quipped that her grandparents praised her racy scenes when they attended the Hollywood premiere with her. Speaking on ‘The Ellen DeGeneres Show’, she said: “For the premiere, I invited my entire family and I didn’t really think about [the nudity]. I was like, ‘It’s a Hollywood premiere! You’ve got to come!’ We were all sitting next to each other watching that giant screen — ginormous screen. [My grandparents] said I have the best t*** in…