Harry Potter star Emma Watson is single again after reportedly splitting from her longtime boyfriend.

The British actress, 19, has been dating 28-year-old financier Jay Barrymore since 2008, but is now said to have ended the relationship just months after she moved to the US to study at Brown University, Rhode Island, reports imdb.com.

'Emma and Jay were in trouble for months and with Emma at Brown University in America, the transatlantic gap proved too much for their relationship to survive,' said a source.