Comedy Films

"Sharon Ferris (daughter)"

"Herbert Russell (as Russel Harper) as Theodore Joseph "T.J." Krupp, Grover's bully later other best friend"

"Christopher McDonald as Donald Krupp, T.J.'s father"

"Amy Sakasitz as Stacy Beindorf, Grover's younger sister"

"Mooky Arizona as Matthew "Matt" Finley, Grover's best friend"

"Kevin Pollak as Ned Beindorf, Grover's father"

"Wallace Shawn as Victor "Vic" Finley, Matt's father"

"Kyle Howard as Gregory Alan "Grover" Beindorf"

"Ever wanted to spend your parents to their room?"

"Jamie Lee Curtis as Janet Beindorf, Grover's mother"

"Caroline Aaron as Louise Finley, Matt's mother"

"Home is where the hostages are."

"There's More Than One Way To Keep A Marriage Together..."

"Alex Seitz as Jimmy Finley, Matt's younger brother"

"Josh Wolford as Teddy Finley, Matt's younger brother"

"Sheila McCarthy as Gwenna Krupp, T.J.'s mother"

"Jennifer Love Hewitt as Brooke Figler, Grover's love interest"

"Jennifer Tilly as Cindy Figler, Brooke's single mother"

"Ray Walston as Chief Rocco"

"Ben Stein as Ralph Doyle"

"Rafaela Ottiano — Elvira - the Maid"

"Hedda Hopper — Laura Proctor"

"Clarence Wilson — Mr. Felix"

"Wallace Ford — Joe Luvalle"

"Adrian Morris — Deputy Abner"

"Arthur Hohl — Arthur Proctor"

"Fred Kelsey — Sheriff Jenks"

"MASCOT'S MIRTHFUL MYSTERY"

"Evalyn Knapp — The Fake Doris Waverly"

"That's the quickest million dollars I ever lost."

"And dead people don't talk."

"Charley Grapewin — Jasper Whyte"

"Regis Toomey — Tom Dean"

"Mary Carlisle — Second Doris Waverly"

"Lucien Littlefield — Dr. Denham"

"Hugh O'Brian - Granger, one of the twins' six fathers"

"Jason Reitman - Granger's grandson"

"Catherine Reitman - Granger's granddaughter"

"Tony Jay - Professor Werner, also the narrator, one of the scientists from the experiment that created Julius and Vincent who raised Julius."

"Nehemiah Persoff - Professor Mitchell Traven, one of the scientists from the experiment that created Julius and Vincent."

"Kelly Preston - Marnie Mason, Linda's sister and Julius' girlfriend-turned-wife."

"Chloe Webb - Linda Mason, Marnie's sister and Vincent's girlfriend-turned-wife."

"Danny DeVito - Vincent Benedict, Julius' younger fraternal twin brother."

"Bonnie Bartlett - Mary Ann Benedict, the twins' biological mother."

"I don't know what the problem is, but I'm sure it can be solved without resorting to violence."

"Thank you for the cookies. I look forward to tossing them."

"David Caruso - Al Greco, a friend of Vincent's."

"Arnold Schwarzenegger - Julius Benedict, Vincent's older fraternal twin brother."

"Trey Wilson - Beetroot McKinley"

"Marvin J. McIntyre - McKinley's man"