Emma Watson surprised her Harry Potter co-star Dan Radcliffe backstage at his Broadway show last night.


The 21-year-old actress joined the star in his dressing room after watching him perform in How To Succeed In Business Without Really Trying at the Al Hirschfeld Theatre in New York City.


The pair, who are clearly close after their many years on the set of the hit wizard franchise, hugged affectionately as they posed for the camera.


She has previously described their relationship as 'like brother and sister'.