Photos: Nick Jonas with his girlfriend at The Big Knockout Boxing

Nick Jonas is handsome in a button-up vest at the inaugural event for Big Knockout Boxing at the Mandalay Bay Events Center on Saturday night (August 16) in Las Vegas.

The 21-year-old entertainer stayed close to his girlfriend Olivia Culpo on the red carpet before the match.
See the photos below:

sourse: justjaredjr.com