Twilight star Kristen Stewart has revealed she gets "really hyper" after attending her movie premieres. The actress says after she has attended a glitzy event she feels full of energy and can't switch off from the excitement of the red carpet, People online reported.

"By the end of the day I actually get really hyper, because it's then that I have my own time," Speaking at the premiere of her new movie Welcome to the Rileys, Kristen said. The 20-year-old star, who plays Bella Swan in the Twilight films, also revealed premieres mess up her sleep pattern. "You end up staying up all night and then screwing your morning the next day because you need time to yourself," Stewart said.