Every overnight success has an origin story. Alan Ritchson's just happens to include Simon Cowell. Long before he was snapping bones as Jack Reacher, in 2004 Ritchson was a 20-year-old aspiring singer auditioning for American Idol, where he survived the contest long enough to charm Paula Abdul before eventually getting sent home. Good thing he turned out to be better at throwing punches than hitting high notes. A year later, he traded microphones for muscles, making his scripted acting debut as Arthur Curry, aka Aquaman, on Smallville. Looking back now, it's easy to forget that Reacher wasn't the beginning of...