The actress released a statement to People expressing her delight at being nominated.
"I am so excited and honoured to be recognised by the Academy and included in such a remarkable group of actors. I'm very proud of my film, my cast and extremely grateful to Mr [Lee] Daniels for the incredible opportunity to play Precious," she explained.
Sidibe was also nominated for 'Best Actress' at the Screen Actors Guild Awards and Golden Globes.
Her co-star Mo'nique won 'Best Supporting Actress' at the Globes and SAGs. She is the only member of the ensemble cast to take home any hardware for the film.