Anastasia Karanikolaou (born June 9, 1997) is an American model. Known as Stassiebaby, she has obtained numerous followers on Instagram, Vine and Twitter. She is best known as the best friend of Kendall and Kylie Jenner. She has more than 3.1 million followers on Instagram. Before fame, she became friends with the Jenners at the age of 11. She is a close friend of the Jenners, as well as Jordyn Woods, Jaden Smith and Hailey Baldwin. She has an older sister named Alexia. She is of Greek descent.