Emma Watson has denied claims that bullying drove her to take a break from university.
Last month the Harry Potter actress announced she was taking time out from her studies at Brown University so she could focus on her film career.
But last week it was alleged that she was bullied out of the US Ivy League college.
One report claimed that when the 21-year-old responded correctly to questions, her classmates would shout "Three points for Gryffindor!" - a reference to a house at Hogwarts, the fictional school in the Harry Potter franchise.
Emma, who plays bookworm Hermione in the movies, said in a message on her website: "I felt the need to let you all know the reason I took a semester off from Brown had nothing to do with bullying as the media have been suggesting recently.
"I have never been bullied in my life and certainly never at Brown. This '10 points to Gryffindor' incident never even happened.
"I feel the need to say this because accusing Brown students of something as serious as bullying and this causing me to leave seems beyond unfair."
She insisted she had not even decided on her own plans for later in the year.
"Please don't try and speculate about what I might do in September - no one can possibly know because I don't even know yet! Like my other fellow Brown students I am trying to figure out my third year and whether or not I will spend it abroad (this is common)."
Staff and students at the university have backed up Emma's claims.