Pictures of Rachel McAdams in Red Marchesa and Michael Sheen at Midnight in Paris Cannes Film Festival Premiere

Rachel Wows on the Red Carpet on Michael's Arm at Cannes

Rachel McAdams changed into a gorgeous semi-sheer red gown for the premiere of her new Woody Allen movie during the Cannes Film Festival yesterday evening. She and boyfriend Michael Sheen were also together earlier in the day at the Midnight in Paris photo call, though they seemed to show even more PDA at the red carpet event — Michael sweetly helped with her dress as she ascended the stairs, and they huddled close while posing alongside co-stars Owen Wilson, Adrien Brody and French actress Léa Seydoux. Their film opened the huge cinema event so we've got plenty more stunning red carpet celebrity moments to look forward to, including Brad Pitt, Angelina Jolie, Johnny Depp and more!

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Source: Getty