Photos: 2015 Snakepit Ball

Celebrities walk the red carpet at the 2015 Indianapolis 500 Festival Snakepit Ball—including John Green, Nastia Liukin, Oscar Robertson, and Andrew Luck in a tux!
On Saturday night, celebrities and athletes walked the red carpet on their way into the 2015 Indianapolis 500 Festival Snakepit Ball, the annual pre–Indianapolis 500 fundraiser at the Indiana Roof Ballroom in downtown Indy.