Bill O'Reilly decided to keep a feud between The Muppets and Fox News going on Monday evening, with a stern warning for the lovable TV and movie characters.

O'Reilly was not very pleased that Miss Piggy hit back against the network's recent criticism of their movie, saying, "It’s almost as laughable as accusing Fox News of being, uh, you know, being news.”

"Though we still like The Muppets, they better watch it," O'Reilly said.

WATCH: Video from Fox News, which was broadcast on January 30, 2012.