Image Credit: John Dominis/LIFE.comWhen you think of ultra-cool Hollywood leading men, a few names immediately spring to mind — Clint Eastwood, Robert Mitchum, Lee Marvin. But the one guy who probably deserves to be at the top of that list of macho men is Steve McQueen. The bad-boy star of The Great Escape, The Cincinnati Kid, and Bullitt would have been 80 years old on Wednesday. (He died at age 50 from cancer in 1980.) To help commemorate his outlaw career on and off the silver screen, Life.com has opened its vaults and unearthed 20 candid shots taken by photographer John Dominis in 1963, right after the 33-year-old star’s breakout performance in The Magnificent Seven. Check out this batch of iconic, intimate photos of McQueen shooting guns, racing cars, boxing in the gym, swigging beer, and dancing with his first wife Neile Adams. They’re fantastic. And when you’re done checking them out, why not head to video store and program your own living-room double-feature of The Getaway and The Thomas Crown Affair?