Margot Robbie’s “Birds of Prey” flew to $4 million on Thursday night in North America.

The figure matches the preview gross for 2018’s “Ocean’s 8” and is comparable to the Thursday night earnings for “Ready Player One,” with $3.8 million.

“Birds of Prey,” a spinoff of 2016’s “Suicide Squad,” is on pace to earn $50 million to $55 million when it touches down in 4,236 theaters this weekend. Warner Bros. has been projecting an opening closer to $45 million.

Robbie stars as Harley Quinn in the eighth entry in the DC Extended Universe. Officially titled “Birds of Prey (And the Fantabulous Emancipation of One Harley Quinn),” the film also stars Jurnee Smollett-Bell, Mary Elizabeth Winstead, Rosie Perez, Ella Jay Basco and Ewan McGregor. The story centers on the titular vigilante teaming up with superheroes Huntress (Winstead), Black Canary (Smollett-Bell) and Renee Montoya (Perez) to save Cassandra Cain (Basco) from the crime lord Black Mask (McGregor).

“Birds of Prey” is directed by Cathy Yan from a script by Christina Hodson. Robbie, who originated the idea, is a producer, along with Bryan Unkeless and Sue Kroll. The film carries a reported $80 million price tag.

“Suicide Squad” was a success financially, with a North American opening of $133.7 million on its way to a worldwide gross of $746 million on a $150 million budget. Robbie conceived the idea for “Birds of Prey” while working on “Suicide Squad,” partly due to the dearth of female-centric action films.

Reviews have been strong, with an 84% rating on Rotten Tomatoes — a reversal from the 27% for “Suicide Squad.”

“Birds of Prey” is the only new wide release in North American multiplexes this weekend. Sony’s “Bad Boys for Life,” which has dominated moviegoing over the past three weekends, should lead the rest of the pack in the $8 million to $10 million range.

“Bad Boys for Life,” with $155 million in three weeks, has been a tonic for the overall business, which is up 9.6%, to $993 million, in 2020, according to Comscore.

“Though the word around town is that 2020 will be a bit of a slow year in movie theaters, someone better tell January and February to slow down the parade of hits that are powering a year to date box office that is running 10% ahead of last year at this point, with ‘Bad Boys for Life’ now being joined by ‘Birds of Prey’ as yet another early-year hit that is drawing big crowds to the multiplex,” said Paul Dergarabedian, senior media analyst with Comscore.