The doctor is in! Kristen Stewart poses with Peanuts character Lucy for breast cancer benefit at Knott's Berry Farm

The #ScreamAgainstBreastCancer benefit at the Los Angeles theme park Knott's Berry Farm got a celebrity drop-in when it was held Saturday night.

Kristen Stewart cut a casual chic look as she posed with a staff member dressed as Charles Schulz' Peanuts character Lucy Van Pelt.

The event brought its guests onto the Supreme Scream ride, and the 26-year-old settled herself into one of its seats, ready to be launched upward.

Duo: The #ScreamAgainstBreastCancer benefit at the Los Angeles theme park Knott's Berry Farm got a celebrity drop-in when it was held Saturday night: Kristen Stewart

For the evening's revelry, she'd popped on a bright orange beanie matching the lining of her otherwise midnight blue bomber jacket.

A loose grey T-shirt matched her seemingly airtight fossil grey jeans, which she'd folded up at the hem over grey socks and black shoes.

Meanwhile, 'Lucy' had swapped out her typical blue dress for grey shorts and a pink T-shirt emblazoned with: 'Knott's Berry Farm for the Cure.'

Squatting down: The Twilight actress, her expression surly as ever, cut a casual chic look as she posed with a staff member dressed as Charles Schulz' Peanuts character Lucy Van Pelt

Schulz had introduced Lucy into the iconic newspaper comic strip in 1952, and she's remained a central part of the Peanuts franchise to this day.

Vince Guaraldi wrote a famous jazz piano piece called Linus And Lucy in the 1965 animated special A Charlie Brown Christmas, since when it's become indelibly connected to the Peanuts brand.

Stewart's recently celebrated the world premiere of her first directorial effort, a short film called Come Swim, at the Sundance Film Festival in Park City, Utah.

Up she goes: The event brought its guests onto the Supreme Scream ride, and the 26-year-old settled herself into one of its seats, ready to be launched upward

Earlier this week, Refinery29 ran an interview in which she described her directorial style, saying: 'I’m a pretty obsessive person, which is I think entirely necessary.'

In her view: 'You have to be a little crazy to put yourself through something like that and actually make it happen. I was probably a little bit more controlling than I thought I would have been.'

Quoth she: 'My favourite thing in the world is when it feels like something starts to get up and walk itself. When something’s really good, and it’s rare - honestly I’ve made a million bad movies.'

Signature style: For the evening's revelry, she'd popped on a bright orange beanie matching the lining of her otherwise midnight blue bomber jacket

She qualified: 'Not bad, it’s just like sometimes they don’t come together in a way that feels miraculous and when they do, it genuinely feels like something is floating and you’re all sort of blowing on it to keep it up and it’s like, that fully happened.'

On a roll, she bloviated onward: 'It’s so cliché, it feels like super pretentious to say this, but you genuinely feel like this vessel and you’re like: "That was sick, I don’t even know what just happened," and it’s just f***ing real.'

Entered in the US Narrative Shorts category, Come Swim - which Stewart's written on top of having directed - had its premiere last Thursday.

High spirits: A loose grey T-shirt matched her seemingly airtight fossil grey jeans, which she'd folded up at the hem over grey socks and black shoes

 

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