Rupert Murdoch

Jim Gianopulos is tasked with turning around struggling Paramount Pictures

Jim Gianopulos is tasked with turning around struggling Paramount Pictures

Viacom Inc. named Jim Gianopulos the new chairman and chief executive of Paramount Pictures, handing the veteran film executive one of the toughest assignments in Hollywood: turning around the struggling Melrose Avenue movie studio.

Viacom Chief Executive Bob Bakish announced the move Monday, bringing to a close a monthlong search to replace Paramount’s former chairman, Brad Grey, who was ousted in February after a string of box-office disappointments and years of financial declines.

Gianopulos, who turns 65 on Tuesday, has spent three decades in the film business. He will oversee Paramount’s film and television operations worldwide, including production, marketing and...

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