The Twilight cast isn't as happy a family as their onscreen counterparts the Cullens are. In real life, Nikki Reed lashes out at fellow actor Robert Pattinson in a behind-the-scenes interview with Seventeen.

While there have been news of the popular cast's on-set feuding, Reed all but confirmed it when she paid a backhanded compliment to the heartthrob.

"He tells very elaborate stories and it's fun to pick them apart to see what's true and what's not because he's a big storyteller," Reed says.

This is not the only time Reed has hinted at the less-than-happy relationships when the cameras aren't rolling.

"In the beginning, it was innocent and fun, and we were like one big happy family - it was like being at sleepaway camp," she reveals in her Seventeen interview.

"And then success comes along and changes the dynamic. We're not all best friends, and we're not all going to hang out together after the final movie is done," she adds, clueing the audience in at the difference that came over the film's biggest stars.

The two co-stars has a rocky past, after Pattinson had a fling with the brunette beauty. Allegedly, his girlfriend (who is also Reed's former best friend) Kristen Stewart was not happy about the past relationship.

Star Magazine reports the BFFs are now at odds over their hunky leading actor, despite the fact Reed is married to American Idol Paul Mcdonald.

"Kristen has never forgiven Nikki for the fling she had with Rob. Kristen never confronted Rob about the affair, she just put the blame on Nikki and accused her of pursuing him," the source tells Star on November.

The source goes on to say Reed has her own issues with Stewart's friendship.

"Nikki is very vocal about Kristen not being supportive of her success," the insider shares.