Bob Harper, Actor: Bob Harper: Ultimate Cardio Body. Bob Harper was born on August 18, in Nashville, Tennessee, USA as Robert L. Harper. He is an. Bob Harper American TV Personality. Born Robert Harper on 18th August, in Clarksville, Tennessee, USA, he is famous for The Biggest Loser Trainer. His zodiac sign is Leo. Those who are super conscious about their fitness are surely introduced to the fitness personality, Bob Harper. A personal trainer by profession.