"Believer" chronicles the adventures of religious scholar Reza Aslan as he immerses himself in some of the world's most fascinating faith-based groups and experiences what it's like to be a true believer. In honor of the docuseries' debut on CNN on March 5, 2017, Wonderwall.com is taking a look back at stars who've portrayed religious leaders over the years, starting with Christian Bale. Back in 1999, the Oscar winner portrayed Jesus on the NBC made-for-TV movie "Mary, Mother of Jesus" (pictured). Fifteen years later, he starred as Moses in "Exodus: Gods and Kings." Now keep reading for more! ("Believer" is produced by Wonderwall.com's parent company, Whalerock Industries.)
Ewan McGregor starred as Jesus in 2015's "Last Days in the Desert."
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Back in 1993, Keanu Reeves portrayed Siddhartha Gautama in flashback scenes about the life of Buddha in the film "Little Buddha."
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Milla Jovovich starred as Saint Joan of Arc in the 1999 film "The Messenger: The Story of Joan of Arc."
Russell Crowe starred as the titular Biblical figure in 2014's "Noah."
Jim Caviezel starred as Jesus in Mel Gibson's 2004 film "The Passion of the Christ," which earned three Oscar nominations.
The late, great Charlton Heston starred as Moses in the 1965 Biblical epic "The Ten Commandments," which earned seven Oscar nominations.
Christian Slater was the voice of Moses in the 2007 animated film "The Ten Commandments."
"Clueless" alum Jeremy Sisto had the title role on CBS's 2000 made-for-TV movie "Jesus."
Ben Kingsley had the title role on TNT's Emmy-nominated 1995 made-for-TV movie "Moses."
Leelee Sobieski earned Emmy and Golden Globe nominations for her portrayal of Saint Joan of Arc on CBS's 1999 miniseries "Joan of Arc." (The project earned 12 more Emmy nominations.)
Willem Dafoe portrayed Jesus in the 1998 film "The Last Temptation of Christ," for which director Martin Scorsese earned an Oscar nomination.
Jon Voight starred as Noah on the 1999 miniseries "Noah's Ark."
Val Kilmer was the voice of both Moses and God in the 1998 animated film "The Prince of Egypt."
Val Kilmer was the voice of both Moses and God in the 1998 animated film "The Prince of Egypt."
Jeremy Irons portrayed Pope Alexander VI on Showtime's "The Borgias" from 2011 to 2013.
The late John Hurt portrayed Jesus in the 1981 Mel Brooks comedy "History of the World: Part I." (The writer-director starred as Moses.)
Joseph Fiennes starred as Martin Luther in the 2003 film "Luther."
The late silver-screen icon Ingrid Bergman starred as the titular saint in the 1948 film "Joan of Arc."
"Westworld" star Rodrigo Santoro portrayed Jesus in the 2016 remake of "Ben-Hur."
Ralph Fiennes was the voice of Jesus in the 2000 stop-motion animated film "The Miracle Maker."
Max von Sydow starred as Jesus in 1965's "The Greatest Story Ever Told."
"The Princess Bride" actor Chris Sarandon portrayed Jesus on CBS's 1980 made-for-TV movie "The Day Christ Died."