Weisz, Craig don't discuss work
The Bourne Legacy actress - who tied the knot with the James Bond star in 2011 - thinks it's boring when thesps talk about their craft together.
She told The Sun: "I don't talk about my work, and nor does he. It's very private. There is nothing worse than two actors getting together and talking about acting. It's like the end - it's the worst."
Rachel, 42, will soon be seen as the Wicked Witch in the Wizard Of Oz prequel Oz: The Great And Powerful, and relished the opportunity to play an evil character.
"It was a fun idea to be playing someone who is really, really bad. I can't think of any roles that I've had like that before," she said.
"My character is more than mean, she's really evil. She is a pathological liar, she's a narcissist, an egomaniac and a megalomaniac. She's a really, really a bad person and she revels in being bad."
The star revealed she tapped into her "own bad girl" to prepare for the part.
"I'm as bad as the next person, but that's the thing about real life - we have to control ourselves," she said.
"The fun thing about being an actor is that you get to be a kid again and children can be quite mean to each other, and that's what it's like being an actor. It's like a playpen - you get to act out stuff that you are not allowed to do in real life."
She continued: ""But I don't think I got rid of my demons or anything. This film is just not serious, it's fun. My demons are all still there."