Nick Jonas & Olivia Culpo Make a Picture Perfect Couple at BKB!

Nick Jonas is as handsome as ever 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.

PHOTOS: Check out the latest pics of Nick Jonas

Also at the event was model Nina Agdal, Pretty Little Liars actress Ashley Benson and personality Maria Menounos.

“On my way to @bkb ready to see some knockouts #BKB @DIRECTV,” Nina tweeted on her way to the event.

FYI: Ashley is wearing Gyunel.

10+ pictures inside of Nick Jonas at the BKB…