As it happened: Oscars 2012

Key points

• At the 84th Academy Awards ceremony in Los Angeles, French silent movie The Artist wins best picture, best director for Michel Hazanavicius and best actor for Jean Dujardin
• Meryl Streep wins her third Oscar for Margaret Thatcher biopic The Iron Lady, while 3D family film Hugo wins five awards including cinematography and visual effects
• Octavia Spencer wins best supporting actress for The Help, while 82-year-old Christopher Plummer becomes the oldest winner ever as best supporting actor for Beginners