Movies Brokeback Mountain, Crash and Capote have been nominated for awards by two influential US bodies.
The Producers Guild of America (PGA) and the Writers Guild of America (WGA) both announced their nominations on the same day.
The PGA shortlisted the three films for its best movie, along with Walk the Line and Good Night and Good Luck.
The WGA nominated the three for best screenplay, with seven others including Russell Crowe's Cinderella Man.
Ang Lee's Brokeback Mountain, about a romantic relationship between cowboys, has already picked up multiple award nominations, including nods from the New York, Los Angeles and Boston Critics' Circles.
It has also been strongly tipped for Oscar success, with actor Heath Ledger praised for his leading role.
Lost is nominated by the PGA for best drama
Ensemble drama Crash, about racial tensions in Los Angeles, was written and directed by Canadian Paul Haggis and stars Matt Dillon, Don Cheadle and Thandie Newton.
Capote stars Phillip Seymour Hoffman as the late author Truman Capote, who formed a strong relationship with a killer whose life he researched for a book.
The WGA splits its awards into two categories - original and adapted screenplays - with The Squid and the Whale, The Constant Gardener, Syriana and Good Night and Good Luck also making it on to the shortlist.
It also plumped for hit comedy The 40-Year-Old-Virgin, which came as a surprise as the genre is rarely recognised during Hollywood's awards season.
The PGA and the WGA ignored Steven Spielberg's Munich, Woody Allen's Match Point and Peter Jackson's King Kong.
The PGA also has TV categories with Lost, 24, Grey's Anatomy, Six Feet Under and Boston legal vying for best TV drama.
Arrested Development, Curb Your Enthusiasm, Desperate Housewives, Entourage and Two and a Half Men are nominated for best comedy.
The PGA will announce its winners on 22 January, while the WGA will hand out its awards on 4 February.