A spokesperson for Emma Watson has shot down reports the Harry Potter actress is enjoying an off-screen romance with new co-star Johnny Simmons.

The 21-year-old Brit sparked speculation she is dating Simmons when they were recently photographed together in Pennsylvania, where they are currently filming upcoming drama The Perks of Being a Wallflower.

However, Watson's representative has dismissed rumors of a budding romance between the colleagues, telling Britain's Daily Mail, "This is complete fiction."

Watson has been single since dating One Night Only rocker George Craig last year.