Despite having a famous father, Ben Affleck's kids still get starstruck by their favorite celebrities.
The Argo star and Clarkson, 39, both recounted times when their kids met one of their idols and could hardly form words as they were so starstruck.
"My kids, like loudest kids on the planet, will not speak," Clarkson says, referencing a time when she brought her son to meet Aquaman's Jason Momoa.
Affleck says the same thing happened to his daughters, Violet, 16, and Seraphina, 12, whom he shares with ex-wife Jennifer Garner, when he took them to meet Swift.
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"We came all the way here, it's Taylor Swift, say something!" he recalls telling his girls, mimicking their blank stares at the time.
"I'm telling you they're fans," he remembers telling Swift when his daughters fell silent.
"You look like a liar, you're like 'I swear they know your songs,' " Clarkson adds with a laugh.
Affleck recently opened up about his love for his family during an appearance on Good Morning America last month. The actor is also dad to son Samuel, 9, with Garner.
"My life is better and I am happier the more I am around my kids," he said.
"We all want to pass on the best of ourselves to our children," Affleck continued. "I don't care who you are, I'm quite sure you feel at some point in your life you've taken missteps, nobody wants to transfer that to our children and that is a real task that everybody faces, whatever those issues are."