Channing Tatum, Ralph Fiennes and Tilda Swinton have joined the growing cast of Joel Coen and Ethan Coen's Hail Caesar, alongside George Clooney and Josh Brolin.

The story centers on Eddie Mannix, a "fixer" who works for the major Hollywood movie studios in the 1950s, keeping the biggest stars of that era in line. We reported last month that the character is loosely based on Fred Otash, a spy for Confidential Magazine who dug up as much dirt as he could on celebrities in the 1950s.

While it isn't known if George Clooney or Josh Brolin are playing Eddie Mannix, Channing Tatum has been cast as a "Gene Kelly-type" movie star, with Ralph Fiennes portraying a film directed named Laurence Lorenz, and Tilda Swinton playing a powerful celebrity gossip columnist.

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Joel Coen and Ethan Coen are directing from their own original script and also producing alongside Working Title's Tim Bevan and Eric Fellner, with Universal Pictures handling distribution. No production schedule was given.

Channing Tatum most recently starred in the blockbuster comedy sequel 22 Jump Street, and he will next be seen in The Book of Life and Foxcatcher. Both Ralph Fiennes and Tilda Swinton recently starred in The Grand Budapest Hotel.