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Will Arnett Replaces David Harbour in Tony Gilroy’s 'Behemoth!' as Production Stays on Track

Sources attribute Harbour’s exit to needing rest after the intense Stranger Things finale publicity.

Overview

  • Searchlight confirmed that David Harbour stepped back from the film, and the role was recast.
  • Deadline reports Will Arnett has joined the cast, with insiders saying only limited reshoots are required and the schedule remains intact.
  • The drama, written and directed by Tony Gilroy for Searchlight, also features Pedro Pascal and Olivia Wilde and follows a musician returning to Los Angeles.
  • Multiple reports say Harbour opted out to rest following the months‑long rollout of Stranger Things’ final season; representatives have not elaborated.
  • Production began in Los Angeles in October, and Harbour was seen filming with Olivia Wilde on December 10 before his departure.