Richard Simmons May Now Approve of Pauly Shore's Biopic, Wishes Him 'Good Luck'

Well, this is crazy ... just days after Richard Simmons seemed pissed Pauly Shore was doing an unauthorized biopic on his life, RS now seems to be giving the thumbs up to the project.

TMZ obtained this video from the Sundance Film Festival Friday night, where Pauly got onstage to introduce the short film that will eventually become the full movie version of Richard's life.

He began by telling the crowd Richard texted him earlier in the day, wishing him "good luck" with the screening. The audience gave its rousing approval.

It's a total about-face ... just a few days ago, Richard wrote on Facebook, "You may have heard they may be doing a movie about me with Pauly Shore. I have never given my permission for this movie. So don't believe everything you read."

To say he never gave his permission is as much as saying DON'T DO THIS!

If Pauly is putting yesterday's text in full context, maybe Richard had a change of heart.

The Wolper Organization, a subsidiary of Warner Bros. that's developing the film, told us -- "While we would love to have him involved, we respect his desire to privacy and plan to produce a movie that honors him, celebrates him and tells a dramatic story."