Zac Posen went to Saint Ann’s School which was a private school found in Brooklyn. He interned with Nicole Miller in the sophomore years. When he was 16 years, he enrolled into the pre-college program with Parsons The New School for Design. After graduation, he was mentored by the curator called Richard Martin in the Costume Institute of The Metropolitan Museum of Arts. He got accepted to attend the womenswear degree program in Central Saint Martins College of Art and Design. In 2001, he made a gown that was made with thin leather strips and the dressmaker eyes and hooks. This was displayed in Victoria and Albert Museum and it was featured under Curvaceous Exhibition.

In 2000, he got his break when he made a dress worn by Naomi Campbell and it changed the hands many times in the fashion insiders and this included Paz De La Huerta who is actress. He is well connected and he made event producer and publicist Ed Filipowski through Ingrid Sischy.

Zac Posen’s first atelier was set in the living room of his parents and they were giving him an allowance of 15 dollars. He got chosen so that he can present capsule collection when he was the part of the GenArt’s Fresh Faces in Fashion New York. He got the grant of 20,000 dollars. After the first runway show, Yves Carcelle courted him. Because of successful presentation, he was able to open up a design studio based in Tribeca. He got an award of Council of Fashion designer of America. He is a favorite of many well known people and they include Beyonce Knowles, Mischa Barton, Jennifer Lopez, Claire Danes, Kate Winslet, Amanda Seyfried, Rihanna and Natalie Portman.

Zac Posen designed the dresses that were worn by Reese Witherspoon, Naomi Watts and Glenn Close for Academy Awards of 2012. He was made official judge for Project Runway in 2012 on Lifetime Television. He entered into the partnership with David’s Bridal and created Truly Zac Posen which is a line of the bridal gowns at a low price. Zac Posen is a gay and he is in relationship with other model called Christopher Niquet. His net worth is over 15 million dollars and he also designs handbags and bags under the names of Eartha Iconic and Eartha Jumbo among others.