Jessica Chastain has confessed she just couldn't resist "geeking out" and posing for a picture when she saw a giant billboard of herself.
The Oscar-nominated Zero Dark Thirty actress is the face of Yves Saint Laurent's new perfume Manifesto, and she is still coming to terms with her fame after spotting a giant ad featuring her face on the side of a building in Paris.
Jessica posted a picture of herself doing a cheesy pose in front of the billboard in Paris on her Facebook page, admitting it was embarrassing but she just had to seize the moment.
She told her fans: "Ok here's pic of me geeking out on my YSL campaign. I was in Paris for fashion week and look what I stumbled upon! It was as tall as a building!
"It was super embarrassing but I had to jump out of my car and seize the moment. I mean, how many times does a girl get a billboard over the Seine River!?! It's so lovely and I wanted to share it with you all."
The excited 35-year-old actress also posted a picture of her very own action figure - a doll of her CIA agent character Maya from Zero Dark Thirty.
"Check out this bada** Maya doll," she wrote. "Amazing, right?!"