Kristen Wiig will contribute to the lunacy in "Anchorman: The Legend Continues."
"Kristen Wiig is officially on board for Anchorman 2," McKay wrote. "Couldn't be more excited."
TheWrap first reported that Wiig was eyeing the project in December. McKay did not say what role she would play in the film, but sources told TheWrap at the time that she would play the love interest of Brick Tamland, the dim-witted weatherman played by Steve Carell in the first movie.
"Anchorman: The Legend Continues" will hit theaters on Dec. 20, 2013.
The "Saturday Night Live" vet, who earned an Oscar nomination for Best Screenplay for 2012's breakout hit "Bridesmaids," will star opposite Ben Stiller in the remake of "The Secret Life of Walter Mitty" and will lend her voice to "Despicable Me 2."