This year's cover sees the 63-year-old posing alongside her two daughters - Sailor Brinkley Cook, and Alexa Ray Joel.
Writing on Instagram, Brinkley said: "Thank you Sports Illustrated for sending the powerful message that good things come in packages of every size and we do not come with an expiration date!"
Christie appears to be literally walking on water in the photo - something she referred to in her Instagram post.
