Christie Brinkley, 64, Twins with 20-Year-Old Daughter Sailor Brinkley Cook in Sexy Workout Gear

Photo: Mark Sagliocco/Getty

Like mother, like daughter!

Christie Brinkley, 64, and daughterSailor Brinkley Cook, 20, showed off their fit physiques and twinned in workout gear at the Southampton Sweat event this weekend.

While Christie dressed in head-to-toe white for the Hamptons event, including a mesh Alo top, cropped leggings, sports bra and athletic sneakers, Sailor showed her abs in an olive Adidas sports bra and leggings.

Nearly two years ago, Christie and Sailor, along with Alexa Ray Joel,posed together in bikinisfor theSports IllustratedSwimsuit Issue, which Sailor called a “very empowering and liberating” experience.

Emmanuelle Hauguel/SI

Christie said, “I kept saying, ‘If you’re ever going to get your picture taken in a bathing suit, doing it withSports Illustratedis the way to go.’ It may look like you’re all alone on this beautiful deserted beach but there are two guys standing there with reflectors, putting the light on you.”

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The one year later, Christie broke the news to Sailor herself that she would be joining SI Swimsuit 2018 rookie class. “You’re on your own now,” Christie told Sailor after delivering the good news. “You’re out of my sandy footprints, and you are on your own!”

Sailor’s been vocal about the pressure she feels following in her mother’s footsteps as a model. “I grew up looking at these photos of my mom, never thinking that I would ever be able to do that,” she told PEOPLE.

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source: people.com