Cannes, France - Hollywood stars Joaquin Phoenix, Pedro Pascal, Riz Ahmed, and Guillermo del Toro have added their names to a letter condemning the film industry's silence on Israel's genocide in Gaza, the organizers confirmed Friday.

The petition, signed by more than 370 actors and filmmakers, also denounced Israel's killing of Fatima Hassouna, the young Gaza photojournalist featured in the documentary Put Your Soul in Your Hand and Walk, which premiered at the Cannes film festival on Thursday.

The organizers of the letter said the French actor Juliette Binoche, who is chairing the jury at Cannes, also added her name to the letter, along with Rooney Mara, US indie director Jim Jarmusch, and Lupin star Omar Sy.

Binoche had initially seemed to pull back from supporting it as the festival opened on Tuesday, instead delivering a tribute to Hassouna, who was killed with 10 members of her family the day after she learned the film would be shown at Cannes.

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"She should have been here tonight with us," an emotional Binoche said at the opening ceremony.

The growing protest comes after several days of mounting bloodshed in the besieged Palestinian territory, with 120 people killed by Israel on Thursday and 50 reported dead since midnight.

Schindler's List star Ralph Fiennes as well as Richard Gere, Mark Ruffalo, Guy Pearce, Susan Sarandon, Javier Bardem, and directors David Cronenberg, Pedro Almodovar, Alfonso Cuaron, Mike Leigh said they were "ashamed" of their industry's failure to speak out about Israel's siege of Gaza in the original letter.

Sicko and Bowling for Columbine director Michael Moore and French actor Camille Cottin of Call My Agent fame are among other entertainment industry figures who have added their names to the letter since Tuesday.