Kieran Culkin Reveals Director's Shocking Behavior On Set When He Was Just 6 Years Old

"What's wrong with you?” the "Succession" star recalled thinking at the time.

Kieran Culkin recalled the uncomfortable way a director treated him during his first acting gig.

During a new episode of the “Smartless” podcast hosted by Jason Bateman, Sean Hayes and Will Arnett, Arnett asked Culkin, 42, to discuss what his first acting experience was like — and his answer left the podcast hosts nearly speechless.

Culkin shared that he had his first acting experience when he was 6 years old for a commercial he couldn’t recall but noted it had “something to do with learning disabilities.”

“The concept was, I’m standing in front of a chalkboard with chalk in my hand, and I don’t know how to solve the easy thing in front of me, and the kids in the class are supposed to be calling me dummy and stupid and all that,” he said of the ad during the “Smartless” episode, released on Dec. 23.

The “Succession” star told the hosts that he had “a distinct memory” of the director yelling “action” before he unexpectedly catapulted insults at the young actor, calling him “dummy,” “idiot” and “stupid.”