The film version of John Le Carre's "The Constant Gardener" was named best picture and took top actor and actress honors at the British Independent Film Awards.

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Stars Ralph Fiennes and Rachel Weisz won the acting trophies during the London ceremony, the BBC reported Thursday.

Neil Marshall was named best director for "The Descent," which also took the award for technical achievement.

Emily Barclay's role in "My Father's Den" garnered the most promising newcomer award and Sean McAllister's "The Liberace of Baghdad" won in the documentary category.

Rosamund Pike won the supporting actress award for "The Libertine," Keira Knightley received the Variety U.K. personality award and Tilda Swinton received the Richard Harris Award recognizing outstanding achievement.

Best screenplay award was given to Frank Cottrell Boyce won best screenplay for "Millions" and the special jury prize was awarded to producer Sandy Lieberson.

The BIFA winners were chosen by a 13-member panel.