Emma Watson signs up for film role
The Harry Potter star will start filming in the summer.
Emma Watson has signed up to The Perks Of Being A Wallflower .
The 20-year-old will play the role of Sam, the girlfriend of a sexually confused 15-year-old, played by Percy Jackson & The Lightning Thief star Logan Lerman .
Emma , who is currently studying at Brown University in the States, will start filming in the summer.