When it was announced that all-around funnyman Russell Brand was hand-selected to host the 2012 MTV Movie Awards, no one was more excited about the news than Brand himself — particularly when we presented him with a list of the lovely leading ladies who would also be present at Sunday's show.

When we let him know that Kristen Stewart, Emma Stone, Mila Kunis and Charlize Theron would all be on hand, there was a lot of whistling on his part.

"I don't watch things like ['Twilight']," Brand said when Stewart was mentioned, but he did offer up a nice whistle. "I don't know, I don't know why I would watch it. But for the people, I like the good-looking boys. Robert Pattinson and him with the tummy," he said, speaking of Taylor Lautner's storied abs. "I met him. He was really handsome."

Brand's tales of celebrity run-ins did not end there: It turns out the "Rock of Ages" star had a very memorable encounter with Stewart's "Snow White and the Huntsman" co-star, Charlize Theron.

"Oh my God. She's amazing, isn't she? [I met her], and it was embarrassing," Brand revealed. "I messed it up bad. I met her and didn't recognize her. I was at a party, and I was looking at birds. She came over and [said] something untoward. And I showed off like an idiot, not recognizing her."

Once Brand realized his mistake, he was distraught.

"I thought, 'Oh no! I didn't use any of my moves!' " he recalled, before adding that Sunday's awards show might present him with the perfect opportunity to reintroduce himself. "It's a new day, it's a new dawn, it's a new life," he said, wondering, "Is she single?"

Head over to MovieAwards.MTV.com to vote for your favorite flicks now! The 21st annual MTV Movie Awards air live this Sunday, June 3, at 9 p.m. ET.