Kiefer Sutherland and Reese Witherspoon will open up the UK premier of 'Monsters Vs Aliens'. Reese portrays the character Susan Murphy, who's unknowingly thrashed by a meteoroid full of outer space slime on her wedding ceremony day and rises up to 49ft 11ins in stature. The armed forces jump into action and she's jostled into a confidential government compound. She's re-named Ginormica and confined with a group of monsters. Kiefer Sutherland acts as General WR Monger, a military lifer who at last discovers a purpose for his accumulation of confined monsters once aliens commence raging Earth. The premier will occur in London’s Leicester Square.