Animal Kingdom, a 20:1longshot, won the 137th Kentucky Derby Saturday, guided by Jockey John Velazquez, the Associated Press reports. The three-year-old colt beat Nehro by 2 3/4 lengths in the 19-horse field. Mucho Macho Man came in third.

The largest crowd in the history of the event -- 164,858 -- watched the two minute race, with tickets costing up to $555 (about $262 minute!) In case you missed the race, video of the exhilirating run is below.

Velazquez actually lost his ride on Uncle Mo Friday when the horse was scratched. Uncle Mo, according to the Los Angeles Times, was considered "the most talented 3-year-old in the country," but didn't make it to the gate after being diagnosed with a mysterious illness that his trainer, Todd Pletcher, and a team of veterinarians have been unable to diagnose.

But Velazquez still came out on top, replacing jockey Robby Albarado on the winning horse after Albarado broke his nose earlier in the week, to guide Animal Kingdom to finish the 1 1/4-mile distance in 2:02.04. "I do really feel really bad for Robby," Velazquez said. "I hope he's winning the Derby with me here."

The owner of the horse, Barry Irwin, was in shock: "I can't believe it -- that's the headline. I'm just thrilled," he told NBC.

Another injury happened during the race to Arkansas Derby winner Archarcharch, who started from the rail, but was vanned off the track with a leg injury and was taken to the backside barns for an X-ray.

Video of the race is below, courtesy of SportsGrid.