While filming 'The Twilight Saga: Breaking Dawn Part 2', youngster Mackenzie Foy (who plays half vamp/half human freak child Renesmee) kept a swear jar on set.
Naturally we quizzed Kristen Stewart about this, and the star told us which 'Twilight' star has issues with swearing.
"It wasn't me. It was Taylor Lautner. He looks like a good boy… but he's not.
"To be honest with you though, I don't think I've heard Taylor say anything worse than crap or darn."
However, when our chums at omg! caught up with Lautner, he insisted he literally never swore during the shoot. "I did not give Mackenzie any money for the swearing jar! She made a tone of money and her price was pretty steep!"
One of them is lying…
Stewart said Mackenzie made "a couple of thousand dollars" from the jar, which went to charity.
The actress wouldn't tell us her favorite swearword, but said she's a fan of "the classics".
Also, in a desperate bid to ask Stewart a question she hadn't heard before, Yahoo! Movies almost succeeded with this guff: "Vampires don't need sleep, so in real life, if you didn't need to sleep, how would you use the extra hours?"
"I've been asked that question already…" she said. "Only once before though, that's saying something!
"I'd maybe take a few more walks? It's dark outside, I'd hide in the shadows. That answer was so much better than the one I gave before."
'The Twilight Saga: Breaking Dawn — Part 2' is released in the UK on 16 November.