Harry Potter is dating Hermione Granger. Daniel Radcliffe has been spotted with co-star Emma Watson on Valentine's Day "using each other's bodies for warmth."

U.K. tabloid The Mirror reports that around 10 p.m., the two were seen going to the Imperial Arms in Fulham, West London and they looked totally absorbed with each other.

"They arrived quite late at the pub - about 10pm - and sat outside, using each other's bodies for warmth," a source says.

"The pair seemed totally absorbed in one another's company, though - they were chatting and joking easily until just before closing time."

The source adds that Watson wore a black top and pashmina scarf and kept looking around "nervously."

It seems only yesterday when the couple met on set almost seven years ago. They have been starring together since the first Harry Potter film with another co-star Rupert Grint. Radcliffe has just recently broken up with his girlfriend, Laura O'Toole, while Watson denies dating Razorlight front man Johnny Borrell.

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