The success of "Barbie" and "Oppenheimer" has come amid a backdrop of turmoil in Hollywood, as a historic double-strike by writers and actors has brought productions to a halt.
A public apology was issued from Warner Bros Film Group in the US after a series of responses related to Barbenheimer on X sparked criticism in Japan.
The film, which stars Margot Robbie in the titular role, and Ryan Gosling as Barbie's iconic beau, Ken, sends Mattel Inc's iconic doll on an adventure into the real world.
"Barbenheimer" became a cultural moment, sending crowds to AMC Entertainment, Cineplex and other cinema chains. More than 200,000 people purchased tickets to see "Barbie" and "Oppenheimer" on the same day, according to the National Association of Theatre Owners.
It also cut snack prices - which movie goers have often complained about for costing more than the ticket - and is offering unlimited popcorn refills on weekends.