Morons from Outer Space

Morons from Outer Space is a 1985 comedyscience fiction film directed by Mike Hodges and stars Griff Rhys Jones, Mel Smith, Joanne Pearce, Jimmy Nail, and James B. Sikking.

The aliens become instant celebrities on arrival, despite being able to bring no great revelation or technical ability to the people of Earth as is central to the plot of many aliens on Earth films. They find a manager Jones and become wealthy more or less overnight, packing fans in auditoriums just to see them. Meanwhile, Bernard arrives on Earth via other means of transport. Despite being by far the most intelligent of the group, Bernard is not afforded any celebrity, and is in fact condemned to vagrancy and a brief stint in mental hospital before reuniting with his fellow travellers near the end of the film. The others, fearing that the introduction of Bernard would lessen their popularity and celebrity, fail to mention that they had originally been travelling with a fourth.

Source: Wikipedia