I was looking for Caroline Munro works and found this 1978 film. This is a Roger Corman production, and in many ways typical of his stuff: cheap. Considered by some a cult film, it was a quick to market rip-off of Star Wars.
There is an evil overlord with a novelty spaceship. There are a pair of
smugglers being pursued by space police. There's risky hyperspace jumps
to avoid those space police. There are robots. There's a weapon the size
of a planet that needs to be dealt with. There's Akton (played by Marjoe
force magic user (it's not really explained, not
even to Star Wars: A New Hope level of explanation.)
And there's Stella Star (played by Caroline Munro in costumes not entirely unlike Barbarella). Unlike a lot of Corman's stuff of the era, this is strictly PG, so while Stella is never, eg, topless, she's clearly meant to be the big draw for a teenage male audience. They do spice it up with a planet of "Amazons" who also dress like the weather is rather warm.
The story is amusingly bad, and the special effects are amusing. There are some robots (not all of them) that remind me of Harryhusen's Sinbad films. (Munro became famous as a slave girl in one of those films.)
But Akton. Ugh. He just ruins the film for me. Gortner's rise to fame came from being ordained at age four and preaching on the "revival" circuit for years in his youth, then turning to acting to earn an honest living. It's an interesting story for the actor, but none of that matters for the film. Throughout this he can never seem to not look smug, and it grates. I've seen him in Bobby Jo and the Outlaw and didn't find him as unwatchable there, so I don't think it was Gortner's fault. (To be clear, the reason to watch that film is not him, the outlaw, but Lynda Carter's Bobby Jo.)
One escape pod out of four.
Starcrash at imdb
Star Wars: A New Hope at imdb