Alonso first joined Marvel in 2006, several years before the studio had released a single movie of its own, and well before the company was purchased by Disney. At that time, she was the head of visual effects and postproduction. And while she initially served as a co-producer on films like , she later became an executive producer on almost everything Marvel released. Since 2021, she has been the studio’s president of physical and postproduction, visual effects and animation production.
Alonso hails from Argentina and moved to the United States as a teenager, first to pursue acting and then to work in the visual effects world. She was recently a producer on , which was Argentina’s official entry for the Best International Feature category at the Academy Awards. It was eventually chosen as one of the five nominees in the category, but it lost to opens in theaters on May 5. According to IMDb, Alonso is a credited executive producer on the film.