The latest Marvel Cinematic Universe blockbuster isn’t out yet — and already it’s broken a new, dubious record: “Eternals” has the lowest-ever rating of an MCU flick on Rotten Tomatoes.

As the star-studded film is not set for widespread release until Nov. 5, it’s possible audiences will feel more positively about it and up its score. But critics have loudly voiced their disappointment with the flick, qualifying “Eternals” for a lowly 62% Tomatometer rating. That makes it the first Marvel Studios movie to get a lower ranking than 2013’s intensely panned “Thor: The Dark World,” which currently has a 66% ranking. (In contrast, that movie’s audience score is 75% Certified Fresh.)

Written reviews of the 2-hour, 37-minute “Eternals” are no kinder. 

“Fresh off of winning the Best Director Oscar for ‘Nomadland,’ Chloé Zhao has upchucked one of the MCU’s worst movies in ages,” The Post’s Johnny Oleksinski critiqued in his one-star review of the PG-13 picture about an immortal crew of Earth-protectors attempting to save the planet from intergalactic bad guys. 

The film is a flop despite hoisting a great deal of star power, including Salma Hayek, Angelina Jolie and Gemma Chan.

“Jolie’s Thena has the personality of a bar of soap and an accent that suggests her semester abroad in London was the best four months of her life,” wrote Oleksinski, never one to mince words.

“It’s ugly, charisma-free, dour, overlong, exposition-heavy, patronizing, and, worst of all, it has none of the heart even feinted at by the least successful films within the MCU canon,” Nick Johnston of Vanyaland panned in a review titled “Proof That the MCU No Longer Has a Heart.” 

Other early viewers had similarly negative feelings.

“It takes a special kind of movie anti-magic to make an entire audience indifferent to the potential destruction of the planet and the elimination of all life and Earth. ‘Eternals’ manages it,” wrote the San Francisco Chronicle’s Mike LaSalle.