She is so flawless!

Christie Brinkley is living proof that age is just a number, because at age 63, she's back in the Sports Illustrated swimsuit edition, accompanied by her daughters Alexa Ray and Sailor. The supermodel sizzles in a black cutout bathing suit, and she's clearly passed down her good genes to her kids.

"Yes! I am excited to announce that I am back in @si_swimsuit ..I figured with my gorgeous daughters @alexarayjoel and @sailorbrinkleycook by my side whose going to be looking at me! Oh and My kids think I walk on water, so let's not mention the apple box concealed just under the surface. For a preview check out @people.com ..and 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! 🌸🌴psI can’t wait to see everyone at VIBES on Feb 17th and 18th in Houston! #proudmomhere!" she captioned the announcement on Instagram.

Even though they're drop dead gorgeous, her girls admit they haven't always felt comfortable in their own skin.

"I’ve had issues with my body image since before I can even remember. I grew up not loving how I looked and felt held back because of it … I don’t need to be a size 0 to believe in myself. My body carries me each and every day, it loves the people I love, it holds what makes me healthy and strong, it bends it shakes it runs and it CHANGES. That is okay and that is beautiful…As a growing young woman SI showed me all bodies are different and all bodies are worthy of celebrating. Thank you thank you @si_swimsuit for celebrating my beautiful mama, my beautiful sister, I, and ALL WOMEN!!” 18-year-old Sailor wrote.

Her older sibling echoed those sentiments.

“Let’s STOP degrading and START celebrating ourselves and others, from both the inside AND out. 👑🕊🦋There’s far too much degradation, competition, insecurity, and unhealthy standards associated with women and their bodies- particularly on social-media … We are all perfect, just as we are. Please know that. Thank you @si_swimsuit for showcasing all heights, shapes, and sizes. For within our distinctions, our quirks, and our self-perceived ‘flaws’… therein lies the beauty," the 31-year-old added.

Such a beautiful shoot!