Marvel producer Victoria Alonso leaves Disney superhero studio

Argentine film producer Victoria Alonso at Rome Film Fest 2021. Eternals photocall. Rome (Italy), October 25th, 2021 (Photo by Marilla Sicilia/Archivio Marilla Sicilia/Mondadori Portfolio via Getty Images)
Victoria Alonso's departure from Marvel Studios has been confirmed. No reason has been given. (Mondadori Portfolio via Getty Images)
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Longtime Marvel Studios executive Victoria Alonso has left the Walt Disney Co.-owned superhero film juggernaut, a rare example of high-level turnover at one of Hollywood's most successful operations.

A Disney spokesperson confirmed that Alonso is no longer with Marvel but did not give any reason for her departure.

Alonso had been with Marvel since 2006, joining as the company’s executive vice president of visual effects and post production.

She served as co-producer on the first "Iron Man," followed by "Iron Man 2," "Thor" and "Captain America: The First Avenger." More recently, she was an executive producer on projects such as "Ant-Man and the Wasp: Quantumania," "Black Panther: Wakanda Forever" and the Disney+ series "Loki."

Marvel became successful because of its consistency in the superhero genre, but its track record has started to show cracks. The latest "Ant-Man and the Wasp" movie was hammered by critics, and the film suffered a steep drop-off at the U.S. box office after a strong debut.

The quality of Marvel's VFX work — Alonso's primary domain along with postproduction — and its treatment of artists have come under criticism within the industry in recent years.

Alonso was among Marvel chief Kevin Feige's key deputies, alongside Nate Moore and Louis D'Esposito. Marvel is an essential anchor of Disney's strategies in both theatrical film and streaming as the company tries to keep attracting subscribers while getting closer to profitability.

Buenos Aires-born Alonso moved to Los Angeles during the 1980s to get into the visual effects industry. She worked with James Cameron and Tim Burton before arriving at Marvel.

Alonso also produced "Argentina, 1985," which was nominated for the Oscar for international feature this year.

Times staffer Jevon Phillips contributed to this report.

This story originally appeared in Los Angeles Times.