Scarlett Johansson and Jonah Hill are in talks to join the star-studded cast of Hail Caesar, which already includes George Clooney, Josh Brolin, Channing Tatum, Ralph Fiennes and Tilda Swinton.

While no details were given for Jonah Hill's role, Scarlett Johansson is playing an actress who becomes pregnant just before her latest film is about to start production. Scarlett Johansson herself is actually pregnant, expecting her first child with fiancee Romain Dauriac, although her role isn't believed to take too long to shoot.

The story is set in the 1950s, following a fixer named Eddie Mannix, who works with all of the major Hollywood movie studios to help their major stars from avoiding scandals. We reported in May that the character is loosely based on Fred Otash, a private investigator who dug up dirt on all the major celebrities for Confidential Magazine by using his wiretapping techniques.

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Joel Coen and Ethan Coen are directing from their own script and producing alongside Working Title's Tim Bevan and Eric Fellner. Production will begin this fall.

Scarlett Johansson will next be seen in the action-thriller Lucy and in next year's Marvel Phase Two sequel Avengers: Age of Ultron. The actress previously starred in the 2001 drama The Man Who Wasn't There for Joel Coen and Ethan Coen. Jonah Hill can currently be seen in the hit comedy sequel 22 Jump Street.