<Li> Connie Nielsen as Hippolyta: Diana's mother and Queen of the Amazons . </Li> <Li> J.K. Simmons as James Gordon: The Commissioner of the Gotham City Police Department, and close ally of Batman . </Li> <Li> Ciarán Hinds as the voice of Steppenwolf: An alien military officer from Apokolips who leads an army of Parademons and is searching for the three Mother Boxes held on Earth . The character is described as "old, tired" and trying to find a way to escape his role of servitude under Darkseid . Hinds portrayed the villain through use of motion capture and received some advice in the process from Liam Neeson, who had recently done similar work in A Monster Calls . After the release of the film, Hinds was reportedly unhappy with the final cut of the film, which trimmed down the backstory and characterization of Steppenwolf . </Li> <P> The Olympian Old Gods Zeus, Ares and Artemis are portrayed by fitness model Sergi Constance, stuntman Nick McKinless, and MMA fighter Aurore Lauzeral, respectively . All three were required to reach a specific degree of physicality, with Snyder instructing McKinless to sport "veins like worms and paper thin skin". In the finished film, McKinless' face was replaced with David Thewlis's face, and Thewlis received the credit as Ares . Robin Wright reprises her role as Antiope during a flashback sequence . Amber Heard portrays the Atlantean Mera . During a scene depicting Steppenwolf's first invasion of Earth, Julian Lewis Jones appears as an ancient king of men, while Francis Magee portrays an ancient king of Atlantis . Joe Morton reprises his role as Silas Stone, Victor Stone's father and S.T.A.R. Labs' head while Billy Crudup appears, uncredited, as Henry Allen, Barry Allen's father . Joe Manganiello and Jesse Eisenberg appear uncredited in a post-credits scene as Slade Wilson / Deathstroke and Lex Luthor, respectively . Michael McElhatton appears as the leader of a group of terrorists who clash with Wonder Woman early in the film, while Holt McCallany makes an uncredited appearance as a burglar . Marc McClure, who portrayed Jimmy Olsen in the Christopher Reeve Superman film series, has a cameo as a police officer . An unidentified Green Lantern appears at the beginning of the film, created by use of CGI and embodied by an uncredited actor . Willem Dafoe and Kiersey Clemons filmed scenes as Nuidis Vulko and Iris West, although their roles were cut from the final film . Both actors are signed for multiple films and set to appear in the future installments of the franchise . Dafoe is set to appear in Aquaman and it was reported in November 2017 that the studio wanted to recast Clemons in a different role . Laurence Fishburne, who portrays Perry White in the DC Extended Universe (DCEU), said he declined to reprise his role in the film due to scheduling conflicts . </P>

Who is steppenwolf in the justice league movie