Christie Brinkley is defending her daughter on social media after her appearance and privilege were criticised.

The supermodel and mother rallied behind daughter Sailor Brinkley Cook on Instagram after the 18-year-old college student and model lashed out against online critics.

Brace yourself .. I'm going to say the words no one wants to hear…back to school! Make that college! Prepping da crib!

A photo posted by Christie Brinkley (@christiebrinkley) on

Christie said that smart phones have “the power to shape people’s lives, self esteem, and confidence. It can make them feel good, or scar them for life.”

She asked her followers to “choose to create beauty, through mutual respect, compassion and love” in the emotional post.

If you're reading this on a smart phone, You are holding a powerful tool in the palm of your hand. It has the power to shape people's lives, self esteem,and confidence. It can make them feel good, or scar them for life. Let's all choose to use this machine to make the world a kinder more beautiful place. Let's choose to create beauty, through mutual respect, compassion and love. Bravo @sailorbrinkleycook sometimes when we we stand up for ourselves, we are standing up for each other. I think we're one post closer to A kinder world. ✌🏼️❤️ Music @johnmellencampofficial

A video posted by Christie Brinkley (@christiebrinkley) on

Sailor posted on Monday that she was “fed up” with constantly being compared to her mother.

She posted screen captures of several comments about her looks and background.

Alright alright. This is going to be super long and super rant-y. Im sorry in advance. So, I usually never read the comment section under any stupid article about me.. And when i do i usually never take the comments to heart.. But i am so fed up. First of all- everyone needs to stop putting me and my siblings and me and my mother in competition. I believe comparison will kill you. Comparison to others is toxic and unhealthy.. As long as I am happy healthy and kind to others why should i care if i am not as 'pretty' as someone else ? Let alone not as 'pretty' as my own blood relatives? Secondly- Pushing down the school i worked my ass off for 4 years to get into, saying its for do-nothing trust fund babies, is not only stereotyping a scholastic community but is just plain incorrect and rude! I know many kids enrolled in Parsons who are the most hard working and passionate students in all of new york. And lastly.. The subject i have been meaning to touch on publicly for years- stop. comparing. me. to. my. mother. Believe it or not I am my own person with my own beliefs and own thoughts and my own face! Eyes smile teeth forehead! All mine! The whole shabang! Yes i am so fortunate that my mother is my mother.. And she will always be an inspiration to me… But being constantly compared to her 50+ years of success at only 18 years old? And being told I could never amount to what she was and what she looks like? Doesn't feel great. I just will never understand these people who WANT to make me feel badly, who WANT to tell an 18 year old girl she cant follow her dreams because if she does she WONT BE AS GOOD AS HER MOM WAS. I'm just a person figuring out what i want to do and what makes me happy. Leave me alone. My one wish is that these people can get off their computers, go chase a sunset, kiss someone they love, pursue one of their dreams and STOP making an 18 year old girl feel constantly inferior and hurt. Lets just fuckin spread love you guys. And pleaseeeee stop trolling me. Thank u🙏🏼

A photo posted by Sailor Brinkley Cook (@sailorbrinkleycook) on

She wrote: “I just will never understand these people who WANT to make me feel badly, who WANT to tell an 18 year old girl she cant follow her dreams because if she does she WONT BE AS GOOD AS HER MOM WAS.

“I’m just a person figuring out what i want to do and what makes me happy. Leave me alone.”

The model ended the lengthy post by saying she wished her critics would “go chase a sunset, kiss someone they love, pursue one of their dreams and stop making an 18-year-old girl feel constantly inferior and hurt”.