Farhadi's "A Separation" won the Oscar for the Best Foreign Language Film at the 84th Academy Awards on Sunday.
This award complements the vast array of honors the film has received for its writer and director Asghar Farhadi, who received the Academy Award at the Kodak Theater in Los Angeles.
"At this time, many Iranians all over the world are watching us and I imagine them to be very happy," Farhadi said in his acceptance speech.
"I proudly offer this award to the people of my country, the people who respect all cultures and civilizations," he added.
A Separation has also been nominated the Best Original Screenplay of the 2012 Academy Awards.
In the Best Foreign Language Film of the Year category, the Iranian family drama went up against Bullhead by Michael R. Roskam (Belgium), Footnote by Joseph Cedar (Israel), In Darkness by Agnieszka Holland (Poland), and Monsieur Lazhar by Philippe Falardeau (Canada).
In the best original screenplay writing category, Farhadi's mesmerizing flick was competing up against Bridesmaids by Kristen Wiig and Annie Mumolo, Margin Call by J.C. Chandor, and Midnight in Paris by Woody Allen.
The drama also turned heads winning The Best Foreign Film Award of the 27th annual Independent Spirit Awards during a ceremony held one day before the 84th Academy Awards.
Farhadi's drama also grabbed the Best Foreign Film Award of the 2012 César Awards on February 24, in Paris.
Farhadi's film also received Best Picture, Best Film Not in the English Language, Best Ensemble and Best Original Screenplay awards of the 9th International Cinephile Society (ICS).
Farhadi's award-sweeper drama has hit the Canadian and the Brazilian cinemas since January 20, 2012, as scheduled earlier.
The film won the award for the Best Foreign Language film at the 2012 edition of Golden Globes. It also received the 2012 Turkish Film Critics Association Award (SIYAD) in the same category.
The 2011 New York Film Critics Circle also granted its Best Foreign Film award to A Separation.
Nader and Simin: A Separation received three top awards of the Best Foreign Language Film, Best Supporting Actress and the Best Screenwriter at the 2012 London Critics' Circle Awards (LCCA).
The movie has also been nominated for the 43rd annual NAACP Image Awards, a multi-cultural accolade presented by the American National Association for the Advancement of Colored People.
The Iranian drama was awarded by the 2012 Broadcast Film Critics Association. It also received the 17th BFCA Annual Critics' Choice Movie's Best Foreign Language Film award.
Farhadi's A Separation was recently selected as the best 2011 film by Wall Street Journal and the second best film of the same year by the international film magazine, Sight and Sound.
The critically-acclaimed movie has entered the Best Foreign film line-up of the International Press Academy (IPA) Satellite Awards.
Nader and Simin: A Separation recounts the story of a middle-class Iranian couple who are getting a divorce, while considering the future of their only child.