The streets of Rio de Janeiro have been littered with Fernanda Torres imitators.

They drink beer, clutch plastic Oscars and deliver the impromptu acceptance speeches that they hope their idol, the Brazilian actress Fernanda Torres, will give on Sunday night at the Academy Awards.

“It’s the peak of fame in Brazil: to become a costume of Carnival,” Ms. Torres said at a film festival in California this month, referring to her many impersonators during pre-Carnival celebrations over the past several weeks.

Ms. Torres was already widely famous in Brazil, but now she has become the nation’s star of the moment for achieving something that has long eluded most of her peers and predecessors here: international recognition.

Since winning a Golden Globe for best actress last month, she has been on an international Oscars campaign for “I’m Still Here,” the Brazilian film about a mother of five navigating the disappearance of her husband during Brazil’s military dictatorship.

Ms. Torres is nominated for best actress while the film is up for best international feature and — in the first such nomination for a Brazilian movie — best picture.