Alien from L.A.

Alien From L.A. is a 1988 science fiction film that stars Kathy Ireland as a young woman who visits the underground civilization of Atlantis. The film was featured on Mystery Science Theater 3000.

An unharmed Wanda wakes up deep within the Earth to find Gus William R. Moses, a miner whom she protects from being slain by two people. Gus, who has a very inconsistent Australian accent, agrees to help Wanda find her father, whom she believes is alive and trapped underground. Wanda soon discovers that both she and her father are believed to be spies planning an invasion of Atlantis. During her adventures, Wandas appearance changes from nerdy to attractive by removing her glasses and using a steam vent to clean her skin. People from the surface world are referred to as aliens by Atlanteans, who appear virtually identical to surface dwellers, and when Wanda is overheard talking about Malibu Beach by a lowlife informant Janie Du Plessis, she soon becomes a hunted woman and must dodge efforts at capture, both from the mysterious Government House and from thugs in the pay of the crime lord Mambino Deep Roy. During these sequences, many references to Wandas big bones are made, as though it were a trait by which she could be identified however, no obvious physical distinction between Wanda and the Atlanteans is noticeable.Wandas efforts at escape are aided by Charmin Thom Matthews, a handsome rogue who briefly assists her flight and falls for Wanda. She is ultimately captured by the evil General Pykov Du Plessis again, who wants to kill both Wanda and her incarcerated father. The Atlantean leader decides to free Wanda and her father, provided they remain quiet about Atlantis. Gus shows up and helps the duo escape while fighting off General Pykov and her soldiers. Wanda and her father board a ship that takes them back to the surface and the film ends with Wanda on the beach, wearing a bikini and a sarong. She refuses the advances of her exboyfriend and is soon reunited with Charmin, who inexplicably appears on a motorcycle. ........

Source: Wikipedia