The ‘Barbie’ actress transformed into a 1960s bombshell during a sun-soaked day in the waves.Margot Robbie attends Tropfest 2026 at Centennial Park on February 22, 2026 in Sydney, Australia.Credit: Getty ImagesThe GistMargot Robbie turned up the heat while splashing into a French Riviera beach day on September 14.The Wuthering Heights actress looked like a ‘60s bombshell in a plunging blue retro bikini with a lace-up detail.Robbie is currently f…