The latest Teenage Mutant Ninja Turtles film has topped the US box office on its opening weekend, taking $35.3m (£24.2m).
But the movie was not as successful as its predecessor, which took $65.6m (£45.4m) when it opened in August 2014.
Last week's number one, X-Men: Apocalypse, slipped to number two with earnings of $22.3m (£15.5m).
Me Before You, based on the best-selling novel by Jojo Moyes, debuted at number three despite mixed reviews.
The film sees Game of Thrones actress Emilia Clarke play a young woman who falls in love with a disabled banker played by Sam Claflin.
Alice Through the Looking Glass, starring Johnny Depp, fell to number four, grossing just under $10.7m (£7.4m) in its second weekend.
The Angry Birds Movie rounded off the top five, making $9.8m (£6.8m).
Disney's Zootopia - released as Zootropolis in the UK - passed the $1bn (£693m) mark over the weekend, only the fourth animated movie in history to do so.
Frozen, Minions and Toy Story 3 are the only other animated films to have passed the milestone.
Only one other film in 2016 has crossed the billion-dollar mark - Marvel's Captain America: Civil War.
Idris Elba, Octavia Spencer, Shakira, Ginnifer Goodwin and Jason Bateman all voice characters in Zootopia, which is set in a city populated by animals.