Robert Pattinson Says Mackenzie Foy Is Cashing In On ‘Breaking Dawn’ Set

Pattinson and Kristen Stewart fork over dough whenever they swear in front of their young co-star — which happens a lot.

For those who weren’t able to tune into our “MTV First: Robert Pattinson” live interview on Friday (March 18), the range of topics covered during our exclusive 30-minute sit-down interview with the “Water for Elephants” and “Twilight” star ran the gamut from a look back at our first MTV interview with him, an RPattz hairstyle retrospective and, of course, a few details about “Breaking Dawn: Part 1.”

We particularly wanted Pattinson’s thoughts about his young co-star Mackenzie Foy, who is playing the much buzzed-about role of Renesmee , Edward and Bella’s daughter.

“Mackenzie is great. She’s really cool. She’s really smart,” Pattinson said before admitting that the 9-year-old has been making some extra money on set.

“She’s got a lot of money out of us swearing around her,” he revealed. “I do it by accident, and especially Kristen does it by accident, because she’ll apologize with a swear [word]. She’s like, ‘Oh sh–! Ugh!’ She can’t stop doing it for about 15 minutes, and [Mackenzie] just waits there [with her hand out],” he laughed.

Pattinson went on to praise Foy’s acting skills, revealing a few of the challenges she’s had to take on while playing a young vampire/human child.

“She’s a great actress. She’s really sweet,” he said. “She has to do a hard part as well, because she’s doing — I don’t want to get into special-effects stuff — but she’s playing a baby in some scenes,” he said. “Oh, man, some of the stuff is so strange. I mean, we’ve done very strange things on the ‘Breaking Dawn’ shoot,” Pattinson said with a laugh.

Check out everything we’ve got on “The Twilight Saga: Breaking Dawn – Part 1.”

For young Hollywood news, fashion and “Twilight” updates around the clock, visit HollywoodCrush.MTV.com.