When Tom Petty first hit the airwaves in 1976 with his debut single "Breakdown" he didn't seem destined to become a superstar – more like the kind of guy who would release a handful of moderately successful singles and never get beyond a cult following. But Petty  just kept getting bigger and bigger as he scored hit after hit. Along the way, he's worked with an incredible bunch of collaborators, including Stevie Nicks, Johnny Cash, Bob Dylan, George Harrison and many others. Here's a slideshow of photos from Petty's amazing career.