Ann-Margret will play Tim Allen's mother-in-law, who is waspish and very critical of her daughter. Michael Lembeck is directing the script, which was written by Ed Decter and John Strauss. All three worked on "The Santa Clause 2," the 2002 sequel to the 1994 holiday smash. She starred opposite Elvis Presley in "Viva Las Vegas." Her recent credits include "Taxi," opposite Jimmy Fallon and Queen Latifah, and a three-episode arc on NBC's "Third Watch" last season.