A star-struck Anne Hathaway completely lost all sense of composure when she realised her idol Mariah Carey was attending the premiere of her new film The Intern.

Hathaway was being interviewed for the Associated Press when she suddenly spotted one of the music industry’s biggest divas walking up the red carpet. Her concentration began rapidly slipping and within no time the usually poised actress had transformed into a dithering mess.

“She’s at my premiere, I mean it’s Bob’s [Robert DeNiro] movie premiere more than mine,” she said quickly. “Oh my God. I’m freaking out. She’s two arm lengths away right now.”

Growing more flustered, she then praised Carey as “just the best glamorous ever”.

“She’s now an arm length away,” she whispered. “It’s fine, I’m going to meet here when the time is right. I just love that this is on camera right now.”

The manically grinning actress managed to restrain herself from running up to Carey and declaring “I’m your biggest fan!” mid-interview. However, she did asked the camera to reposition itself so she could be on screen with her at the same time.