Urusei Yatsura Movie 1: Only You is an anime film that premiered in winter 1983, produced by Studio Pierrot.

About the production: the story comes from a manga, the film runs about 102 minutes and its current status is "finished".

Its main genres are adventure, comedy, romance and sci-fi, with themes such as Male Protagonist, Space, Slapstick and Aliens.

On AniList, Urusei Yatsura Movie 1: Only You has an average score of 68%, a good score, and appears on 5,233 users' lists.

Lum doesn't need much assistance going ballistic when everyone in Tomobiki gets an invitation to Ataru's wedding -- and she's not listed as the bride! It seems that some 11 years ago, Ataru played "Shadow Tag" with a young girl named Elle and won. Unfortunately, Elle was yet another Alien Princess; and on her planet, if a boy steps on a girl's shadow, they have to marry. When Elle's emissary comes to make arrangements, Lum redefines the term "the atmosphere was electric," but to no avail: a force-field now protects Ataru from her high voltage love-zaps. Lum's friend Benten suggests a pre-emptive wedding, and they proceed to abduct Ataru and all of the wedding guests, and the stage is set for the shotgun wedding of all time! (Source: AniDB)

Official synopsis from AniList.