London, June 28 (IANS) Actress Kristen Stewart says she becomes hyper after the premiere of her movies.

‘By the end of the day I actually get really hyper, because it’s then that I have my own time. You end up staying up all night and then screwing your morning the next day because you need time to yourself,’ contactmusic.com quoted Kristen as saying.

Kristen is busy promoting her upcoming movies. She appeared at the Los Angles premiere of ‘The Twilight Saga: Eclipse’ Thursday and new drama ‘Welcome to the Rileys’ Friday.