Olivia Colman Says She 'Loved' Her “Wonka” Physical Transformation: 'I Was So Cozy with My Extra Boobs' (Exclusive)

"I loved being a baddie," the Oscar winner says of her role in the new musical origin story

Olivia Colman wanted a gnarly grin for her villainous Wonka transformation.

In the new Willy Wonka origin story, the Oscar winner stars as Mrs. Scrubbit, an innkeeper who tricks the aspiring chocolatier (Timothée Chalamet) into signing a lifelong contract that forces him to work for her.

"I loved being a baddie," Colman tells PEOPLE. "I didn't really enjoy physically shoving [costar Calah Lane] around, but she was going, 'I'm fine, I'm cool with it. Just do it.' But it is fun being a baddie and saying all the things you wouldn't normally say. I've just really enjoyed it."

Colman, 49, and the film's creative team also got to have fun with her appearance as the slimy conwoman. (Oscar winner Lindy Hemming was in charge of costume design, while Colman's hair and makeup artist for the film was Suzanne David.)

"The teeth were... We went through various shades of yellow. I really liked the filthy ones, and everyone talked me down and went, 'I think we should probably go for something just a little subtle.' So we went for subtle yellow," she says.

The actress explains that they envisioned Mrs. Scrubbit as "a little bigger, so she had bigger bosoms and a bigger bum, and she was really confident." She jokes about being in costume on set during chilly U.K. days: "I was so cozy with my extra boobs. I loved it."

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Meanwhile, "the hair, there's something about the hair that had a slightly tobacco yellow color to it," says Colman. "There's all these little touches that she clearly bleaches her hair, using probably the laundry bleach, but it's gone a bit tobacco. All these discussions that happened!"

It was "really fun," she says.

How was it going head-to-head with her 27-year-old costar Chalamet? "I've been so incredibly impressed by the way he works," she says, joking, "And wishing I was better at— I just want to copy him!"

"He's just so kind and joyful and ready," says Colman of Chalamet, who scored a Golden Globe nomination for the musical. "He would go to the camera and go, 'I know I want to change that. Can I do that better?' I was thinking, 'That was already amazing. What's he going to do?' And then you go, 'Oh, yeah, that was even better.' He was so impressive and so lovely to work with."

Director Paul King, also known for the recent Paddington movies, tells PEOPLE he wants the family-friendly Wonka to be just as fun and whimsical for adults as it is for children.

"In many ways I think we've lived through a kind of golden age of family movies recently, especially in the animation side of things," he says. "You think about what Pixar did and how they really elevated that and told some extraordinary, heartwarming stories and really raised the bar for people. I think it's lovely to do live-action movies that feel like they can speak to the whole family."

Related: Timothée Chalamet Says Wonka Is His Mom's 'Favorite' of His Films: 'You Gotta Be Happier in Your Movies!' (Exclusive)

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Adds King, "For me, the great family movies, which is what I aspire to, are the ones that it's the same laughs for the kids as the grownups and the same feelings and the same emotions for the kids as the grownup."

"It's always a shame if you go, this bit's for the kids but parents can look away and scroll through their phones, and then the kids get bored when there's a scene that's just for the grownups," says the director. "I want it to work for everyone. That's the challenge."

Wonka is in theaters Friday.

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