Joshua Marble was born in Sacramento, California, and spent a significant portion of his early life in the state. He later relocated to Colorado and Arizona before eventually settling back in Southern California. Throughout his childhood, Joshua was actively involved in various sports and participated in theatre, showcasing his versatility. However, a severe sports injury led him to reassess his collegiate football aspirations and instead pursue a career in modeling and acting.
In 2007, Joshua received an invitation to participate in a nationwide modeling competition in Anaheim, California, which marked the beginning of his journey in front of the camera. Within weeks of the competition, he signed with his first exclusive agency, launching his professional career.
