Carrey, 53, who has been a longtime guest host on the popular sketch, commented on Williams on SNL's 40th anniversary special, reported Us magazine.
"Can I ask you a question, you guys?" Carrey asked 'Today' show co-hosts Matt Lauer and Savannah Guthrie on the red carpet.
"Where are you hiding Brian Williams? Where is he? I just want to say something in his defence. If the helicopter in front of me gets hit, I'm taking the story," he joked.