Aubrey Plaza and Jake Johnson co-starred in the film, which also earned a best first screenplay award and nomination for best first feature at the IndependentSpiritAwards.
"The King's Speech is going to make them so much money back I hope it encourages the continued government support of British film, " said Hooper at Saturday's IndependentSpiritawards.
Ms. Williams gave the best performance among the SpiritAwards winners with a touching acceptance speech acknowledging her kinship with low-budget independent filmmakers and recalling her first time at the ceremony a decade ago.