Nicholas John Frost is an English actor, comedian and screenwriter. He has appeared in the Three Flavours Cornetto trilogy of films, consisting of Shaun of the Dead (2004), Hot Fuzz (2007), and The World's End (2013), and the television comedy Spaced (1999–2001). He also appeared in Joe Cornish's film Attack the Block (2011). He co-starred in the 2011 film Paul, which he co-wrote with frequent collaborator and best friend Simon Pegg. He has also portrayed various roles in the sketch show Man Stroke Woman. In 2020, he cocreated and starred in the paranormal comedy horror series Truth Seekers with Pegg.

Paul is a 2011 comic science fiction road film directed by Greg Mottola from a screenplay by Simon Pegg and Nick Frost. Starring Pegg and Frost, with the voice and motion capture of Seth Rogen as the titular character, the film follows two science fiction geeks who come across an alien. Together, they help the alien escape from the Secret Service agents who are pursuing him so that he can return to his home planet. The film is a parody of other science-fiction films, especially those of Steven Spielberg, as well as of science fiction fandom in general.