On Behalf of My Son, a new film written and directed by Brazilian filmmaker Gabriel Martins, has been selected for the official competition at the San Sebastian International Film Festival, Netflix announced August 14.

The selection places the feature in the festival's main competitive program. Netflix's announcement identifies the event as the 74th edition of the festival in Spain and describes the film as a production associated with Minas Gerais-born director Martins.

The San Sebastian selection follows an earlier announcement that the film had joined the Platform section of the 2026 Toronto International Film Festival. Netflix has said Filmes de Plastico produced the feature in partnership with the streaming company.

The two festival notices establish the selections and the production credits attributed by Netflix. They do not establish how juries or audiences will receive the film, and Boho News has not independently verified a wider commercial release plan.

The next concrete milestones are the festival screening schedule, any award decisions and a confirmed release date. Netflix has said the film will premiere in 2026, but the sources reviewed for this brief do not provide a more specific public release date.