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Twilight director Catherine Hardwicke says she warned Rob Pattinson about getting romantically involved with co-star Kristen Stewart when she was just 17.

"After I cast him, I told Rob, Don't even think about having a romance with her," Hardwicke tells Time. "She's under 18. You will be arrested."

And according to Hardwicke, despite an intense attraction, Pattinson did heed her warning. On the first film, anyway.

"In terms of what Kristen told me directly, it didn't happen on the first movie. Nothing crossed the line while on the first film." Kristen did turn 18 after the first film was shot. "I think it took a long time for Kristen to realize, O.K., I've got to give this a go and really try to be with this person," Hardwicke said, "outing" the relationship they've tried to keep under wraps for so long.

With X17online's photographic proof and the director's admission, I think we can finally confirm what we've always known, that these two have been an item since the Twilight film saga began!

Check out the gallery below to see pix of Robsten holding hands in Paris!