TORONTO (Reuters) - He's one of Hollywood's biggest stars, but Brad Pitt says heenjoyed taking a smaller role as part of an ensemble in the new film "Babel," and was humbled by the work of several nonprofessional actors in the film.

Directed by "21 Grams" director Alejandro Gonzalez Inarritu, "Babel" made its North American debut at the Toronto International Film Festival this weekend.

An intense tale of four interlocking stories spread across three continents, the film was a favorite at the Cannes film festival earlier this year and is generating Oscar buzz.

"Being a part of an ensemble is always more fun, you don't have to carry the film," Pitt told reporters in Toronto on Sunday, one day after throwing fans into a frenzy at the red-carpet screening of the film.

"For me, I consider myself more a citizen of the world, and I have great pride as I sit up here with all the people from different cultures, and know that we all came together," he said.

Pitt stars alongside Cate Blanchett as a couple on vacation in Morocco when tragedy strikes. Their story is linked to that of two shepherd boys living in a remote village, and also to two narratives taking place at the U.S.-Mexican border near San Diego, and in Japan.

Pitt's and Blanchett's scenes were filmed on location in Morocco, and Inarritu used several non-actor locals to fill out the cast, which he said was the most difficult challenge he had faced as a director.

He singled out one scene in which Blanchett's character needs medical attention, and the only help available is the village veterinarian.