Steve Martin, Heather Graham & Eddie Murphy in "Bowfinger"
Tim Allen, Rene Russo & Stanley Tucci in "Big Trouble"
Michael Caine, Carol Burnett, John Ritter, Christopher Reeves, Nicolette Sheridan in "Noises Off"

None of these movies made it at the box office, but they crack me up.

However, if a pretty gal asks that question, I say it was "The Princess Bride" . Seems they love it.