Bystander thrilled over same-sex couple's engagement

CHICAGO (WTXF) - People are loving this bystander's reaction to a couple's engagement. Her reaction is just priceless.

Law student Jessica Rodriguez's brother captured the moment she proposed to her girlfriend of four years, Chelsea Miller, at the Art Institute of Chicago over the weekend. The big moment quickly went viral not only for the proposal but because of the woman's reaction in the background of the photo. The bystander looked thrilled for the couple.

"I loved her reaction! Whoever she is, we are so thankful of her pure reaction. She made our moment even more special!" Jessica told BuzzFeed.