Victoria Alonso (born 22 December 1965) is an Argentine film producer who formerly served as the president of physical and post-production, visual effects, and animation at Marvel Studios.

Victoria Alonso was born on 22 December 1965 in La Plata, Buenos Aires Province, Argentina.

Alonso moved to Seattle at the age of 19 to pursue an acting career. She relocated again to Los Angeles, where she began working in the visual effects industry, including at Digital Domain as a visual effects producer for four years, working on films such as Big Fish (2003), which was nominated for Best Special Visual Effects at the 57th British Academy Film Awards.

Alonso joined Marvel Studios in 2005 as executive vice president of visual effects and post-production, working as a co-producer on Marvel Cinematic Universe films Iron Man (2008), Iron Man 2 (2010), Thor (2010), and Captain America: The First Avenger (2011), and serving as executive producer on every Marvel Studios production since The Avengers (2012), including television shows. She was promoted to executive vice president of production in 2015. In 2021, Alonso was promoted to president of physical and post-production, visual effects, and animation at Marvel Studios.

In 2016, Alonso became the first woman to win the Advanced Imaging Society's Harold Lloyd Award for her achievements in visual effects. In January 2020, she was awarded the Filmmaker Award by the Motion Picture Sound Editors at the 67th Golden Reel Awards. In October 2021, it was announced that Alonso would be the top honouree at Outfest's Visionary Award at the November ceremony at LA's Academy Museum of Motion Pictures.

In December 2022, she was named on The Hollywood Reporter's "Women in Entertainment Power 100.".

In 2023, Alonso was fired from her role at Marvel Studios for breach of contract after violating her noncompete clause by serving as a producer on the Amazon Studios film Argentina, 1985, despite having failed to seek permission to work on the film and continuing to promote it after being ordered by Disney to cease her involvement with the project.

At the time of her firing, criticism from VFX workers was noted, who had raised complaints of Marvel's "demanding post-production schedules." Alonso was described by some as a "kingmaker," with Chris Lee at Vulture reporting that Alonso was "singularly responsible for Marvel's toxic work environment." However, Alonso was also described as the "epitome of professional" and supportive on set, with Joanna Robinson of The Ringer describing the reports as a "gross mischaracterization" and the opposite of Alonso's work. Alonso said that the real reason for her firing was her outspoken opposition to LGBTQ+ erasure at the company. Disney and Alonso reached a multimillion-dollar compensation settlement in April.

Alonso is openly gay and is married to Australian actress Imelda Corcoran. The couple has one adopted daughter.

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