The 58-year-old director remains amazed by how many musicians love the rockumentary following spoof metal band Spinal Tap - but he sees their devotion as the highest compliment.
Reiner tells British magazine Hotdog, "I remember when I was doing PRINCESS BRIDE, Sting came in to read for one of the parts.
"In the meeting, he says to me, 'I've seen this movie 50 times. I watch it when we are on tour on the bus. Every time I watch it, I don't know whether to laugh or cry.'"