MUMBAI: Monsters University retains the North American box office throne. The Billy Crystal-starring movie about the college life of Mike Wazowski and Suley Sullivan bagged an estimated $46.2 million in its second run for Walt Disney Pictures, a 44 per cent drop from last weekend‘s opening.

Paul Feig helmed The Heat stands at No. 2 in its first week with approximately $40 million. The reason for the Sandra Bullock starrer doing well has been attributed to it being marketed well. Sony Pictures‘ White House Down, meanwhile, debuts to an estimated $25.7 million in the fourth place. Despite the disappointing result, the action-heavy movie starring Channing Tatum and Jamie Foxx is expected to still play well over the next few weeks.

World War Z, the zombie flick starring Brad Pitt, drops 55 per cent to approximately $29.8 million in its second outing, taking the third spot. Rounding up the top five is Henry Cavill‘s Man of Steel, which is estimated to rake in another $20.8 million for Warner Bros.