Can Alfonso Cuarón be beat for the best director Oscar?

Certainly, he’s the front-runner after the Directors Guild of America weighed in Saturday night, awarding Cuarón its top prize for directing the black-and-white film “Roma.” Nearly every D.G.A. winner repeats in this category at the Oscars, and Cuarón already has plenty of momentum after taking the best director honor from the Golden Globes and Critics’ Choice Awards last month.

[Here’s a complete list of Oscar nominations.]

Cuarón, who used his acceptance speech to praise the Oscar-nominated leading women of “Roma,” Yalitza Aparicio and Marina de Tavira, was given the award by his friend Guillermo del Toro, who won the honor last year for directing “The Shape of Water.” Between Cuarón, del Toro and Alejandro G. Iñárritu, Mexican directors have taken five of the last six Directors Guild awards.

Still, though many D.G.A. categories, including television prizes, had a racially diverse lineup of contenders, few women were nominated and none of them won, prompting the host, Aisha Tyler, to dub the ceremony a “multiethnic sword fight.”

Among the night’s other big winners was the “Eighth Grade” director Bo Burnham, who pulled out a surprise win for first-time feature filmmaking. “I really did not think this was mathematically possible,” Burnham said in his acceptance speech, and neither had most pundits, who predicted that the “Star Is Born” director Bradley Cooper would have this debut award sewn up.