They Will All Die in Space (Spanish:Morirán en el espacio or Ellos morirán en el espacio) is a 2015 English-language Spanish short science-fiction horror film written, directed and produced by Javier Chillon, about a starship technician (Julio Perillán) who is awoken from cryo-sleep and is told that the vessel is adrift and lost in the cosmos, and that he is needed to help repair the communications system to call for help, but quickly realises that something has gone horrifyingly wrong. Chillon's third short film was shown at well over 300 film festivals between 2015 and the end of 2019, and has won approximately sixty awards and honours, including Best Short Film from the 2015 Sitges Film Festival, the most important fantastic film festival in Spain.

In 2017, They Will All Die in Space received a general theatrical release through its inclusion in the Canadian science-fiction horror anthology film, Galaxy of Horrors.