Margot Robbie stopped by The Tonight Show with Jimmy Fallon on Tuesday to promote her new movie, Whiskey Tango Foxtrot. During the interview, Fallon asked the actress about Suki Waterhouse’s recent housewarming party in London, which corralled high-profile guests like Sienna Miller, Cara Delevingne, and some polite redheaded man. The rest of the party was business as usual, including a trip to the photo booth with her model friends (and the redheaded mystery man). The twist? That handsome, bespectacled redhead, whom Robbie thought was Ed Sheeran, was actually Prince Harry! “What are you talking about? You don’t know who Prince Harry is?” Fallon exclaimed. “He’s the coolest!” Her excuse for the mix-up? “He wasn’t wearing a crown!” Watch the clip below.