The 39-year-old star stopped by the show to discuss her role in the upcoming Lego Movie, but when probed about the unexpected death of Hoffman, Banks said she was still "in shock."
"He is an absolutely amazing actor, respected by everyone and part of our family at The Hunger Games," she said. "We will miss him terribly, and obviously, [we're] really upset for his children and his partner."
Hoffman was found dead of an apparent heroin overdose in his New York City apartment on Sunday. The New York City medical examiner's office said Wednesday that an autopsy conducted on the actor's body proved inconclusive. Hoffman is survived by his partner of 15-years, custom designer Mimi O'Donnell, and his three children.
"It's just a tragedy," Banks said.