"Mark says, 'I haven’t smoked pot in 10 years; the second half’s going to be so much fun,' " the 'A Real Pain' actor claims ...

In a new interview with The Guardian, Kieran Culkin makes a point of saying that he doesn’t do drugs and never has—with one ...

Kieran Culkin has admitted to getting actors high on stage in what fellow movie star Mark Ruffalo described as 'the worst ...

The “Succession” actor was only 17 when he decided to pull a prank on Ruffalo and switch out a prop joint with the real deal.

Kieran Culkin recalled how he swapped a prop joint with real marijuana while pulling his prank on Mark Ruffalo ...

Succession’ star revealed that he switched prop joints for the real thing while starring in an off-Broadway production when ...

Actor Kieran Culkin shares a mischievous backstage story from his early acting days involving Mark Ruffalo and a swapped prop.

In 2010, I spoke with Mark Ruffalo partway through a monthslong ... And that’s why I’ve recently seen a lot of Kieran Culkin, who’s considered the supporting actor front-runner for ...

Kieran Culkin opened up about a prank he pulled on Mark Ruffalo. In an interview with Guardian, the 42-year-old actor ...