Entertainment

Thor: Ragnarok opens strongly with $121M US at box office

Thor: Ragnarok thundered to one of the year's best box-office debuts, opening with an estimated $121 million US in North American theatres.

Robust debut is beating the trend of diminishing returns for sequels

This image shows the Hulk, from left, Chris Hemsworth as Thor, Tessa Thompson as Valkyrie and Tom Hiddleston as Loki in a scene from, Thor: Ragnarok. The film had a strong opening at this weekend's box office. (Marvel Studios via The Associated Press)

Thor: Ragnarok thundered to one of the year's best box-office debuts, opening with an estimated $121 million US in North American theatres.

The robust debut for the third Thor movie was a welcome shot in the arm for Hollywood and theatre owners who have just suffered through a terrible October at the box office.

Thor: Ragnarok also bucked the trend of diminishing returns for sequels. The 2011 Thor debuted with $65.7 million; 2013's Thor: The Dark World opened with $85.7 million.

The big opening cements the unlikely breakthrough of New Zealand director Taika Waititi, who shepherded the $180 million production to Marvel's best reviews since 2008's Iron Man.

The weekend's other new nationwide release was the holiday-themed comedy sequel A Bad Mom's Christmas. It grossed $17 million over the weekend.