Kieran Culkin has revealed himself as the “naughty young actor” who was responsible for getting Mark Ruffalo ... I’m 42 now. I know better. I’m not going to try to get anyone high onstage.” When he ...

"I was 17 and stupid," Culkin prefaced of his time in Playwright Horizons' production of James Lapine's play The Moment When at the time. "I'm like, 'I thought this was a good prank. I'm stupid.

The star of “A Real Pain” and “Succession” admitted that he once swapped a prop joint for one spiked with real marijuana when he was cast in a stage production alongside Mark Ruffalo in 2000.