"I'm going to do you one better. I can tell you how he didn't die," Ventimiglia said, after Kimmel asked the hard-hitting question.
"[Jack] did not die by sticking his head in the microwave while making popcorn. He eats a lot of popcorn! He didn't die while eating a peanut butter and banana sandwich on the toilet, like Elvis [Presley]. Gluten didn't kill him," he rattled off jokingly. "He was not overcome with emotion at a [Justin] Bieber concert. And he didn't die giving birth."
So there you have it, folks. Straight from the horse's mouth, it's safe to knock these four (super unrealistic) "theories" off the list!
Fans won't have to wait too long to find out what caused Jack's demise. Last week, creator Dan Fogelman promised that all the questions to Jack's death will be answered in the second season.
"If that is a question that is haunting people, in the course of the second season they will get all the answers about they want,” Fogelman said at NBC's Television Critics Association summer press tour, noting that the season two premiere “will feed the beast.” “The first episode has a big, giant piece of the puzzle that will potentially set the internet abuzz and also, hopefully give some momentum toward that storyline.”
Ventimiglia, a first-time Emmy nominee, also revealed on Jimmy Kimmel Live! whether he was bringing his parents to television's biggest night in September.
"My mom and dad declined. They said they're holding out for an Academy Award," he shared. "I was like, 'I made it in TV, and I'm going to the big show for TV!' They're like, 'Nah, we're gonna wait for the Academy Awards.'"
This Is Us premieres Tuesday, Sept. 26 at 9 p.m. ET/PT on NBC.