Stephen Frears' "The Queen" is the critics' favourite to take the best picture award at the Venice Film Festival this year, with Emilio Estevez's star-packed "Bobby" leading a strong chasing pack. Queen Elizabeth is played by Helen Mirren, also seen as a frontrunner for the best actress category when the world's oldest film festival hands out the prizes late on Saturday and winds up an 11-day movie marathon. Reuters reports.