News Princess Diana Wore the Most Gloriously '80s Dress to the Premiere of When Harry Met Sally She called star Billy Crystal "naughty" during the London screening 30 years ago. By Isabel Jones Isabel Jones Instagram Twitter Isabel is an Oregon-born and Brooklyn-based writer and editor with a special interest in pop culture. InStyle's editorial guidelines Updated on July 13, 2019 @ 07:00AM Pin Share Tweet Email It’s hard to believe that a romantic comedy as sharp and socially relevant as When Harry Met Sally came out 30 years ago, but one need not look past Meg Ryan’s tousled ‘do to know that the film was, in fact, a product of 1989. Georges De Keerle/Getty Images The film’s premiere(s) brought out a slate of A-listers, some of whom have stood the test of time, others who haven’t (O.J. Simpson and Nicole Brown’s date night is off-putting in retrospect, to say the least). Jim Smeal/Getty Images Maria Shriver, John Cusack, and Bruce Willis and Demi Moore all came out for the film’s L.A. premiere. Ron Galella, Ltd./Getty Images Ron Galella, Ltd./Getty Images Ron Galella, Ltd./Getty Images Months later, when the movie came to London, Ryan and co-star Billy Crystal made an incredibly high-profile fan: Princess Diana. The late Princess of Wales arrived at the premiere in a bright red Bruce Oldfield gown with a silvery criss-cross pattern, ruched fabric at the hips, and voluminous short sleeves — i.e. the most ‘80s dress of all time. Adding to the era’s quintessential vibe, she rimmed her eyes with cobalt blue eyeliner. Julian Parker/Getty Images Julian Parker/Getty Images In an exclusive interview with People for the film’s 30th anniversary, Crystal and director Rob Reiner opened up about what it was like to watch their film with the beloved royal. Mirrorpix/Getty Images “All I’m thinking the entire time is, ‘How is she responding to this?'” Reiner recounted. “And now the orgasm scene is coming, I’m going ‘Oh God. Oh my God.'” Jack Quaid Wouldn't Watch Mom Meg Ryan's Most Famous Movie for a Hilarious Reason Crystal, who sat next to the princess, said, “The lights went down and she whispered to me, ‘I’m taking my shoes off.’ So I went, ‘I’m taking my pants off.’ And she goes, ‘Oh, you’re so naughty!'” “She turned to Billy and says, ‘I’d be laughing a lot more, except I know everybody’s looking at me,'” Reiner shared. “And then she asked for the film at Buckingham Palace so she could watch it with her friends.” One can only hope Buckingham Palace still owns a dusty VHS version of When Harry Met Sally.