Chris Sullivan revealed on The Tonight Show that he actually had food poisoning when filming the wedding scene on the show.

“At my real wedding I wore traditional Celtic garb – a kilt,” he said. “At Kate and Toby’s wedding I had food poisoning.”

“I’m really trying to work the title of the show into the show. I try to say ‘this is us,’” he added. “The closest I’ve ever gotten was Kevin and Toby riding in a taxi and they’re pulling up to a building. Every new take I’d be like, ‘You know what right here is fine, this is us,’ or, ‘Actually, this is us right here.’ They caught it.”