Friends, Lovers, or Nothing

"A guy and a girl can just be friends, but at one point or another, they will fall for each other... maybe temporarily, maybe at the wrong time, maybe too late, or maybe forever.."

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Grace Kopecky meets Tom Hiddleston on the set of their new movie, in which they play a pair of close siblings. In order to perfect the sibling relationship they must have, they agree to spend plenty of time together. They spend enough time together to become best friends, remaining close even after production. But is something more than friendship there?