All Hail King Julien is an American animated television series that stars King Julien, Maurice, and Mort from DreamWorks Animation's Madagascar franchise and takes place in Madagascar before the events of the first film, making it a prequel. It is the second DreamWorks Animation show to be based on the Madagascar franchise.

The series was announced in March 2014 as part of an agreement between Netflix and DreamWorks Animation, under which the studio will develop more than 300 hours of exclusive programming for the service. The series is based on the characters from Madagascar, but is a prequel, set prior to the events of the film series. Danny Jacobs, Andy Richter and Kevin Michael Richardson reprised their roles from previous Madagascar media, while Henry Winkler, India de Beaufort and Betsy Sodaro joined the cast.

The series debuted on December 19, 2014, on Netflix when the first five 22-minute episodes were released. Season 2 was released on October 16, 2015. Season 3 was released on June 17, 2016, Season 4 was released on November 11, 2016, while next season, subtitled Exiled, was released on May 12, 2017. The fifth and final season was released on December 1, 2017. The series is currently showing reruns on Universal Kids in the United States. The show was removed from Netflix globally in November 2023.