Blake Lively was visibly anxious on the set of ‘It Ends With Us’

As rumors swirl that Blake Lively and her “It Ends With Us” costar Justin Baldoni had a thermonuclear feud, a spy on the set tells Page Six that the actress was visibly uncomfortable on set.

Last week, The Hollywood Reporter wrote of Lively (who was a producer on the film) and Baldoni (who was the director) that “there was a divide between the filmmakers in the post-production process.”

It seems that this supposed division resulted in two completely different versions of the film, one of which was allegedly commissioned by Lively.

But a seasoned insider tells us the weird vibes seemed to start before post-production, when the film was still shooting, and the “Gossip Girl” actress was visibly nervous on set.

“The tension was so evident,” we are told.

“When the scene was over, she was really impatient, she was like, ‘Am I done? Can I go?’ and as soon as they said ‘yes,’ there was like a Blake-sized hole in the wall.”

They added: “She was so off.”

The film source adds that when she wasn’t eager to leave, Lively would look at her phone between takes.

Meanwhile, TMZ reported yesterday that Lively felt “fat shamed” after Baldoni mentioned her weight during filming, according to a new report.

The actor reportedly asked a trainer on set how much Lively weighed before filming a scene in which he had to lift her.

According to the media, he has a history of back problems.

The site reported that there had been tension between the co-stars over a kissing scene that the “The Sisterhood of the Traveling Pants” star, 36, thought went on too long.

There is another undercurrent of anxiety surrounding the film’s release because Lively has been accused of being too edgy in interviews about the film, given that the film is largely about domestic violence.

Lively’s representative did not respond to us.