The Keeping Up With the Kardashians star, who's been spotted going casual while out and about in Hollywood lately, traded in the jeans and tee for a super dashing ensemble last night. Stepping out for the Gabrielle's Angel Foundation's Angel Ball 2013 at Cipriani Wall Street in New York City, Jonathan took a page out of Kris Jenner's book and rocked an all-black, sleek suit-and-tie combo.
While the reality TV personality flew solo for the star-studded event, he and his girlfriend Anat Popovsky are still going strong.
Click through the gallery to see Jonathan posing for photos on the red carpet, dining at his table, and more! What do you think of the pics? Sound off in the comments.