Culkin and Ruffalo shared the stage in Playwright Horizons' 2000 production of James Lapine's "The Moment When." ...

Kieran Culkin has admitted that he once swapped a prop joint for a real one while acting in a play alongside Mark Ruffalo ...

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

Kieran Culkin has admitted that he once swapped Mark Ruffalo's prop joint for real weed during a stage production in 2000.

Kieran Culkin admitted that he once tricked Mark Ruffalo and other co-stars into getting stoned during a live theatrical performance.

Kieran Culkin is coming clean about the prank he played on Mark Ruffalo 25 years ago. The A Real Pain actor, 42, revealed in ...

Kieran Culkin recalled the swapped-joint incident, which went down when he and Mark Ruffalo starred in the stage play 'The Moment When' together when the now 42-year-old Culkin was just a teen.

Culkin said the stage manager then appeared with a message, “‘I don’t care whose it is, or what happened, but Kieran, give me the joint.’ I sheepishly handed her the roach and she said, ‘Ruin your ...

Succession star Kieran Culkin recently opened up about getting actor Mark Ruffalo ‘high’ long ago as part of a prank, when ...

Mark Ruffalo would have no choice but to go method for a particular night of performing on stage thanks to Kieran Culkin's ...

Kieran Culkin has admitted he mad a ‘stupid’ mistake when he pulled a bold prank on an unsuspecting Mark Ruffalo.

Kieran Culkin reminisces about a mischievous prank that got Mark Ruffalo and co-stars hilariously high during a live theater performance.