All Hail the King is a 2014 American direct-to-video short film featuring the Marvel Cinematic Universe (MCU) character Trevor Slattery, produced by Marvel Studios and distributed by Walt Disney Studios Home Entertainment. It is a follow-up and spin-off of Iron Man 3 (2013), and is the fifth Marvel One-Shot short film set in the MCU, sharing continuity with the films of the franchise. The film is written and directed by Drew Pearce, and stars Ben Kingsley as Slattery, alongside Scoot McNairy, Lester Speight, and Sam Rockwell. In All Hail the King, a documentary filmmaker (McNairy) interviews the infamous fake terrorist Trevor Slattery while in jail.

Development for a One-Shot centered on Kingsley as Slattery began during production of Iron Man 3, which introduces the character. Pearce, who co-wrote that film, conceived of an idea that was contingent on Kingsley being willing to reprise his role. The actor was enthused to do so after reading the script. Filming occurred in Los Angeles over three days, with Pearce later flying to Canada to film Rockwell's appearance as Justin Hammer, reprising his role from Iron Man 2 (2010).

All Hail the King was released digitally and on the home media release of Thor: The Dark World (2013) in February 2014 and was positively received. The story of Slattery, the Mandarin, and the Ten Rings is continued in the film Shang-Chi and the Legend of the Ten Rings (2021).