Monika “Jac” Jagaciak, is a Polish fashion model. She was born January 15, 1994 in the Wielkopolska, Poland. In 2007, she signed with IMG Models, and since than Jagaciak has been given the nickname “Jac” by the agency. In September 2012, Jagaciak was ranked 17th along with Frida Gustavsson on the Top 50 Models Women List by Models.com. She is currently represented by IMG Models.