I also adore:
Galaxy Quest (1999) Someone named Jeff Cross wrote a terrific summary of this witty romp about make-believe and real heroism, at imdb:
"Eighteen years after their sci-fi adventure show "Galaxy Quest" was cancelled, actors Jason Nesmith, Gwen DeMarco, Alexander Dane, Tommy Webber, and Fred Kwan are making appearances at sci-fi conventions and store openings in costume and character. They're wallowing in despair and at each other's throats until aliens known as Thermians arrive and, having mistaken the show for fact and consequently modeling their entire culture around it, take them into space to save them from the genocidal General Sarris and his armada."
The performances are first-rate, and what a cast! Tim Allen, Sigourney Weaver, Tony Shalhoub, Alan Rickman, Darryl Mitchell, Sam Rockwell, Missi Pyle, Robin Sachs, Patrick Breen, Enrico Colantoni and Justin Long each strike just the right notes. David Howard and Robert Gordon wrote the alternatively very funny and touching script, and Dean Parisot directs with a sure hand. The dialogue is simply choice. A sample:
Mathesar: We have enjoyed preparing many of your esoteric dishes. Your Monte Cristo sandwich is a current favorite among the adventurous.
Sir Alexander Dane: I played Richard III.
Fred Kwan: Five curtain calls...
Sir Alexander Dane: There were five curtain calls. I was an actor once, damn it. Now look at me. Look at me! I won't go out there and say that stupid line one more time.
Brandon's Mom: Where are you going with those fireworks?
Brandon: Well, the Protector got super-accelerated coming out of the black hole, and it, like, nailed the atmosphere at Mach 15, which, you guys know, is pretty unstable, obviously, so we're gonna help Laredo guide it on the vox ultra-frequency carrier and use Roman candles for visual confirmation.
Brandon's Mom: Uh, all right, dinner's at seven. [Brandon exits. Mom turns to a dubious Dad] Well, he's outside.
Jason Nesmith: As long as there is injustice, whenever a Targathian baby cries out, wherever a distress signal sounds among the stars, we'll be there. This fine ship, this fine crew. Never give up... and never surrender.
Words to live by. And you'll hear them again at the very end of the credits, quietly spoken, but with deep feeling by Enrico as Mathesar.