(NEW YORK) -- Argo received yet another award on Sunday, this time from the Writers Guild of America.
Ben Affleck's thriller earned the prize for best adapted screenplay at the 2013 Writers Guild of America Awards, which were presented at simultaneous ceremonies in Los Angeles and New York.
Chris Terrio wrote the screenplay for Argo, which was based on a book by former CIA agent Tony Mendez -- played by Affleck in the film -- as well as a Wired Magazine article.
Argo tells the story of a CIA mission led by Mendez that rescued six American diplomats hiding in the Canadian ambassador's home during the Iranian hostage crisis in the late 1970s.
The award for best original screenplay went to Zero Dark Thirty, written by director Kathryn Bigelow's collaborator, Mark Boal. The movie focuses on the nation's hunt for Osama bin Laden.
Both Argo and Zero Dark Thirty are best-picture nominees heading into this Sunday's Oscars ceremony.
The WGA Awards honored AMC's Breaking Bad and FX's Louie as the top drama and comedy TV series, respectively.
Here's a complete list of winners:
Zero Dark Thirty
Searching for Sugar Man
Breaking Bad, AMC
“The Other Woman,” Mad Men, AMC
“Virgin Territory,” Modern Family, ABC
Long Form – Original
Hatfields and McCoys, Nights Two and Three, History Channel
Long Form – Adapted
Game Change, HBO
“Ned and Edna’s Blend Agenda,” The Simpsons, Fox
Comedy/Variety (Including Talk) – Series
Comedy/Variety – Music, Awards, Tributes – Specials
66th Annual Tony Awards, CBS
Copyright 2013 ABC News Radio