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

American model, actress and businesswoman, Christie Brinkley, 64, and daughter Sailor 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 bikinis for the Sports Illustrated Swimsuit Issue, which Sailor called a “very empowering and liberating” experience.

Christie said, “I kept saying, ‘If you’re ever going to get your picture taken in a bathing suit, doing it with Sports Illustrated is 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.”

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!”

Check out the photos below: