Harry Potter and the Prisoner of Azkaban, the third Harry Potter film, has made almost $93m (£50m) at the US box office in its first three days.
The third Potter film made £5m on its first day of release in the UK
The film took $92.7m between Friday and Sunday, according to studio estimates.
That was a more successful start than Potter's other films, The Philosopher's Stone and The Chamber of Secrets.
It put the film third in the all-time list of opening earnings - behind Spider-Man, with $114.8m (£62.2m), and Shrek 2, with $108m (£58.5m).
Shrek 2, which topped the chart for the last two weeks, is now in second place, having taken $37m (£20m) between Friday and Sunday.
Its overall total now stands at $313.6m (£170m) and is poised to overtake Finding Nemo's $339.7m (£184m) to make Shrek 2 the most successful animation in US cinema history.
Disaster thriller The Day After Tomorrow, which entered the chart last week at number two, fell to third place with $28.15m (£15.2m), pushing its 10-day total to $128.8m (£69.8m).
TOP FIVE US FILMS
1. Harry Potter and the Prisoner of Azkaban - $92.7m
2. Shrek 2 - $37m
3. The Day After Tomorrow - $28.2m
4. Raising Helen - $6.7m
5. Troy - $5.7m
Source: Exhibitor Relations
Romantic comedy Raising Helen stayed at four, while Brad Pitt's epic Troy slipped two places to five.
The first two Harry Potter films have made almost $600m (£325m) in the US.
The first, called Harry Potter and the Sorcerer's Stone in the US, took $90.3m (£48.9m) in its first weekend, while its 2002 sequel made $88.4m (£47.9m) in its first three days.
"I guess audiences are still crazy about Harry," said Dan Fellman, head of distribution for film studio Warner Bros.