Kieran Culkin is fessing up to a prank he pulled nearly 25 years ago on his one-time Broadway co-star Mark Ruffalo. The 42-year-old actor was just 17 when he starred in a 2000 production of James Lapine's The Moment When. One scene called for Ruffalo to roll and smoke a fake joint, with Culkin revealing there was a 'bag of fake joints,' and he swapped one of them out with a real one.
![[One scene called for Ruffalo to roll and smoke a fake joint, with Culkin revealing there was a 'bag of fake joints,' and he swapped one of them out with a real one]](https://i.dailymail.co.uk/1s/2025/01/03/05/93700159-14246197-image-a-47_1735883269281.jpg)
'I was 17 and stupid,' Culkin admitted, adding that weeks later, he smelled marijuana and knew the real joint was found, as it turns out, by Ruffalo, on stage. He added that he 'just watched' as Ruffalo took long, extended draws from what he thought was fake weed.
'I’m like, "I thought this was a good prank. I’m stupid. Oh my God, I’m so sorry." But actually, they loved it,' Culkin admitted. One scene called for Ruffalo to roll and smoke a fake joint, with Culkin revealing there was a 'bag of fake joints,' and he swapped one of them out with a real one.
![[He said there was another co-star, 'who had never smoked pot in her life,' who said, ‘Is this what being high is? This is lovely']](https://i.dailymail.co.uk/1s/2025/01/03/05/93700165-14246197-image-a-49_1735883337552.jpg)
'Mark says, "I haven’t smoked pot in 10 years; the second half’s going to be so much fun,"' Culkin added. He said there was another co-star, 'who had never smoked pot in her life,' who said, ‘Is this what being high is? This is lovely.'. 'And then Phyllis Newman comes in and goes, "I haven’t smoked pot since the 1960s. Thank you, darling,"' Culkin said, though admitting the stage manager was not as happy.
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