This year’s August box office is off to a sluggish start as Sony’s fantasy adventure The Dark Tower is poised to debut in the No. 1 spot with an estimated $19.5 million gross in the U.S. and Canada, edging out Christopher Nolan’s World War II epic Dunkirk and its estimated $17.6 million in its third weekend in theaters.

The weekend’s other new release, the Halle Berry thriller Kidnap, is on track for fifth place with an estimated $10.2 million, while Kathryn Bigelow’s prestige drama Detroit is stumbling with an estimated $7.3 million take as it expands nationwide.

Although Sony and Media Rights Capital made The Dark Tower for a relatively modest $60 million, its opening haul represents an underwhelming figure for a movie that was intended to launch an ambitious film and TV franchise after spending years in development.

Based on Stephen King’s sprawling eight-book series, The Dark Tower stars Idris Elba as a cowboy-knight named Roland Deschain, Matthew McConaughey as a sinister sorcerer known as the Man in Black, and Tom Taylor as a boy with psychic powers who could be the key to saving this world and others. Danish filmmaker Nikolaj Arcel (A Royal Affair) directed.

Despite the star power and much-loved source material, critics pilloried the film, and moviegoers gave it a tepid CinemaScore of B, suggesting that word-of-mouth will be weak.

Coming in behind The Dark Tower are three holdovers: Warner Bros.’ aforementioned Dunkirk; Sony’s animated offering The Emoji Movie, with an estimated $12.4 million; and Universal’s road-trip comedy Girls Trip, with an estimated $11.4 million.

Dunkirk and Girls Trip are both holding strong after 17 days in theaters, with the former tallying a $133.6 million total in North America and the latter reaching $85.4 million, according to estimates. The Emoji Movie, meanwhile, is looking at a standard-issue 50 percent dropoff in its second weekend.

Rounding out the top five is Kidnap, a film that was shot back in 2014 and originally dated for a 2015 release before Relativity Media’s financial woes. Aviron Pictures picked up domestic rights.

Directed by Luis Prieto and starring Berry as a single mother on a mission to rescue her abducted son, the movie received lackluster reviews but garnered a decent B+ CinemaScore.

As for Detroit, Bigelow’s searing account of that city’s 1967 riots, the movie marks an inauspicious start for Annapurna Pictures’ first distribution effort. But the film — which reportedly cost $34 million to make and stars John Boyega, Anthony Mackie, and Will Poulter — has garnered strong reviews and an A- CinemaScore.

Per ComScore, overall box office is down 2.9 percent from the same frame from last year. Check out the Aug. 4-6 figures below.

Check back for updates …

1. The Dark Tower — $19.5 million
2. Dunkirk — $17.6 million
3. The Emoji Movie — $12.4 million
4. Girls Trip — $11.4 million
5. Kidnap — $10.2 million
6. Spider-Man: Homecoming — $8.8 million
7. Atomic Blonde — $8.2 million
8. Detroit — $ 7.3 million
9. War for the Planet of the Apes — $6 million
10. Despicable Me 3 — $5.3 million