Family film Dolphin Tale has climbed to number one on the US box office chart, knocking The Lion King 3D off the top spot, according to early estimates. Dolphin Tale, about a boy's friendship with a dolphin whose tail was lost in a trap, stars Morgan Freeman, Ashley Judd and Harry Connick Jr. The movie made $14.2m (£9.1m) in its second week of release. Brad Pitt baseball drama, Moneyball, remained at number two, with takings of $12.5m (£8m). The Lion King 3D slipped to third spot - it has earned $79.7m (£51.3m) since it was re-released. The highest new entry was 50/50, a comedy-drama about a young man's battle against cancer. Other new entries on the chart included police drama Courageous and thriller Dream House, starring real-life husband and wife Daniel Craig and Rachel Weisz. The film is about a family who learns of the brutal murder of former residents of their seemingly idyllic new home.