The London premiere of Hollywood blockbuster Iron Man 3 has been rescheduled to avoid clashing with Margaret Thatcher's funeral procession. The superhero sequel was due to be unveiled in the British capital on Wednesday (17Apr13), the same day royals and politicians from across the world will gather in the city to remember the former U.K. prime minister following her death on Monday (08Apr13). However, movie bosses have now decided to push the premiere back to avoid clashing with Thatcher's funeral. The cast of the film, including Robert Downey, Jr. and Gwyneth Paltrow, will now walk the red carpet at the Odeon Leicester Square cinema a day later, on Thursday (18Apr13). The decision to move the premiere was reportedly taken after officials at Westminster Council voiced concerns that hosting two crowd-drawing events in the city on the same day would provide serious logistical difficulties. Thousands are expected to descend on the centre of London to watch Thatcher's ceremonial funeral procession, which will end in a service at St. Paul's Cathedral. Queen Elizabeth II is expected to attend, along with British Prime Minister David Cameron and U.S. President Barack Obama, and stars such as Dame Shirley Bassey and theatre impresario Andrew Lloyd Webber.