The black hole in Christopher Nolan’s Interstellar is called Gargantua.
Gargantua is a supermassive rotating black hole near the film’s wormhole destination. The spacecraft Endurance and its crew travel to planets orbiting it while searching for a possible home for humanity. The black hole’s immense gravity produces extreme time dilation, a central idea in the story.
The film’s visual depiction of Gargantua was created with detailed computer simulations based on relativistic equations. The work was developed with scientific input from physicist Kip Thorne, who later wrote about the science behind the movie. The result became one of the film’s most recognizable images.
Gargantua is the black hole, while Endurance is the spacecraft and Miller is the name of one of the planets. Those names are commonly mixed together because all are tied to the same mission and sequence.