It seems Fanning can make the best of any situation -- including missing her prom night!
ET caught up with the actress earlier this year, where she dished about missing her own prom to promote her movie, The Neon Demon, at the Cannes Film Festival, but still made the night special.
"It was the best prom night ever!" she said, revealing that she invited her best friend, Cass, to Cannes with her to party the night away.
"We always planned to go our senior year to prom together, but then I had to call him and I was like, 'I'm going to Cannes' and then we were like, 'Wait, do you want to come out to Cannes?!' He was like, 'Yes!'"