Mullins was born in Allentown, Pennsylvania. She was born with fibular hemimelia (missing fibula bones) and as a result, had both of her legs amputated below the knee when she was one year old. A graduate of Parkland High School in Allentown and Georgetown University in Washington, D. C. , she took up sports and acting at an early age. Also while at Georgetown, Mullins won a place on the Foreign Affairs internship program, working at The Pentagon. In exchange for her scholarship, she was obliged to work seven years for the state, a commitment she did not finish .