While she’s still young, Amanda Seyfried is flaunting her sexy figure — and doffing her pants! The 27-year-old actress was spotted running around the Brooklyn set of her upcoming movie, While We’re Young, on Tuesday, Sept. 24, wearing orange bikini bottoms and a white shirt.

Seyfried showed off her thin legs in the revealing outfit while appearing to film a block party scene. The blonde beauty styled a white sleeveless sweater top with a stain on the front over her knit bikini, and wore brown clog heels. Looking carefree, she skipped around set and sipped a beverage alongside costar Naomi Watts.

While We’re Young, directed by Noah Baumbach, is about an uptight documentary filmmaker (Ben Stiller) and his wife (Watts) who befriend a free-spirited younger couple (Seyfried and Adam Driver.)

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Though Seyfried is busy with filming, she’s carving out free time for her new boyfriend Justin Long, which Us Weekly exclusively revealed news of their romance last month. “They recently started hanging out more, going on date-like activities,” a source told Us of the former friends. “They’re both busy . . . but they’re seeing where it goes.”

On Aug. 27, the couple were photographed enjoying a date at the park along with Seyfried’s beloved dog Finn. “Justin and Finn get along very well I hear,” a source told Us, “which is very important to Amanda of course. [Long’s] a big dog person, I can attest to that.”

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