It is a 1990 horror

Horror film

Horror films seek to elicit a negative emotional reaction from viewers by playing on the audience's most primal fears. They often feature scenes that startle the viewer through the means of macabre and the supernatural, thus frequently overlapping with the fantasy and science fiction genres...

 television miniseries

Miniseries

A miniseries , in a serial storytelling medium, is a television show production which tells a story in a limited number of episodes. The exact number is open to interpretation; however, they are usually limited to fewer than a whole season. The term "miniseries" is generally a North American term...

 based on the novel of the same name

It (novel)

It is a 1986 horror novel by American author Stephen King. The story follows the exploits of seven children as they are terrorized by the eponymous inter-dimensional predatory life-form that exploits the fears and phobias of its victims in order to disguise itself while hunting its prey. "It"...

. The story revolves around an inter-dimensional predatory life-form that is simply referred to as "It", which has the ability to transform itself into its prey's worst fears allowing it to exploit the fears and phobias of its victims, while also disguising itself when hunting. The main protagonists are "The Losers Club", or "The Seven", a group of social outcasts who discover "It" and vow to destroy him by any means necessary.