Emily Ratajkowski bared her bum — again ... her hair as she showed off her backside in a white and green thong bathing suit bottom. She paired the scantily clad swimwear with a white crop ...

Led by Cillian Murphy, "Oppenheimer" also stars Emily Blunt, Matt Damon ... Blunt wore a rose gold suit by Dolce & Gabbana, while Pugh was in a blue denim dress by Moschino Jeans.