Skip to Video Player

Why Rosie O’Donnell Didn’t Recognize Mark Ruffalo on ‘I Know This Much Is True’ Set

“Extra” spoke with Rosie O’Donnell as she promoted her new six-part drama series “I Know This Much Is True.”

Over Zoom, O’Donnell dished on co-star Mark Ruffalo’s physical transformation in the miniseries, in which he portrays twin brothers struggling with mental illness. Due to “how different” he looked within about a month and a half, Rosie was unable to recognize him on set. Watch!

“I Know This Much Is True” premieres May 10 on HBO.

The Latest