Sailor Brinkley Cook, the 18-year-old daughter of supermodel Christie Brinkley, has responded to a slew of internet trolls who have attacked her appearance, schooling and other attributes.

In an Instagram message posted late Wednesday night, Brinkley Cook wrote, “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” with anonymous posts such as those in a sampling she gave. Among the messages: “She’s a pretty girl but nowhere what her mother was” and that Brinkley Cook’s 30-year-old half-sister, singer Alexa Ray Joel, “is actually prettier than Sailor.”

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“First of all- everyone needs to stop putting me and my siblings and me and my mother in competition,” Sag Harbor resident Brinkley Cook, a student at Parsons School of Design and a professional model with IMG, wrote. “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? ”

Brinkley Cook, whose father is Brinkley’s fourth ex-husband, architect Peter Cook, added, “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! … 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? … 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.”

She also defended her college, which one troll called “the ultimate NYC school for do-nothing trust fund babies.” Brinkley Cook said that was “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.”

In her own Instagram post Thursday, Christie Brinkley applauded her daughter’s actions: “Bravo @sailorbrinkleycook, sometimes when we stand up for ourselves, we are standing up for each other. I think we’re one post closer to a kinder world.”

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