Ender's Game has blasted to the top of the U.S. box office in its opening weekend (01-03Nov13).

The futuristic sci-fi film, which stars Harrison Ford, took in $28 million (£18.6 million), beating out Johnny Knoxville's Jackass Presents: Bad Grandpa, which earned $20.5 million (£13.6 million), bringing its total to more than $62 million (£41.3 million) in two weeks.

Animated film Free Birds and Last Vegas, which stars Morgan Freeman, Robert De Niro, Michael Douglas and Kevin Kline, tied at three, both debuting with $16 million (£10.6 million).

Meanwhile, Thor: The Dark World crushed the competition outside of the U.S., opening with a $109 million (£72.6 million) haul internationally ahead of its American release on Friday (08Nov13). The sequel is expected to power its way past the success of the original, which took in $450 million (£300 million) worldwide in 2011.