Sandra Bullock's space drama Gravity and historical epic 12 Years A Slave tied for the top honour at the Producers Guild of America awards.
The two movies - directed by Alfonso Cuaron and Steve McQueen respectively - both won the feature film gong.
For the past six years, every film chosen by the guild for its top honour has gone on to win the best picture prize at the Academy Awards.
While an Oscar tie is unlikely, the rare split keeps the Academy Awards race wide open in one of the tightest three-way battles in years. David O Russell's con caper American Hustle is also still very much in the running after big showings at the Golden Globes and Screen Actors Guild Awards.
Other trophies presented night at the guild's 25th annual awards ceremony in Beverly Hills, California included Frozen for animated feature and We Steal Secrets: The Story of WikiLeaks for documentary film.
Behind The Candelabra won for television movie or miniseries, Breaking Bad won for TV drama series and Modern Family took home the prize for TV comedy series.