The 22-year-old British actress, in a Brood dress and strappy Tabitha Simmons shoes, gave her Perks of Being a Wallflower co-star Ezra Miller a big hug as soon as she spotted him on the carpet.
Emma is up for Best Female Performance for her work in Harry Potter and the Deathly Hallows: Part 2.
Russell Brand hosts the 2012 MTV Movie Awards live TONIGHT at 9 p.m. ET on MTV!
FYI: Emma accessorized with Givenchy and Hermes cuffs.