Shia LaBeouf shared on Twitter Wednesday a letter he received from the attorney of comic book writer Daniel Clowes saying the actor has once again been plagiarizing his client.

The Nymphmaniac: Volume 1 star uploaded a photo of drawings for his new short film and captioned the shot, "Storyboard for my next short Daniel Boring its like Fassbinder meets half-baked Nabokov on Gilligan's Island." He later posted a photo of a letter claiming his project is a rip-off of David Boring, a comic originally written by Clowes.

The writer's attorney, Michael Kump, wrote a letter to LaBeouf's lawyer accusing the actor of plagiarism.

"Your client refers to Daniel Boring as his next short film, but as Mr. LaBeouf obviously knows, David Boring is the title of a comic series and graphic novel by Mr. Clowes that is well-known," Kump wrote. "In fact, in 2005, Time Magazine chose Mr. Clowes' work David Boring as one of the ten best graphic novels ever written."

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Kump also wrote that LaBeouf's idea for Daniel Boring violates Clowes' rights under the law. He then made claims about LaBeouf behaving inappropriately.

"Your client is seriously out of control," Kump wrote. "He must stop his imporoper and outlandish conduct directed at Mr. Clowes and his works, and your client must take all necessary and appropriate steps to redress his wrongs."

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Kump ended the letter by giving specific instances showing LaBeouf's "foolishness," including the latter's recent sky-written apology to Clowes in connection to a previous accusation of plagiarism.

"We have been waiting since December 27 to hear how Mr. LaBeouf intends to make right," Kump wrote. "But all that has happened is further wrongful acts, such as described above, and more foolishness such as Mr. LaBeouf's New Years' Day sky-writing frolic that exposed Mr. Clowes to further ridicule. Leave Mr. Clowes alone, and address and fix these problems immediately. All rights and remedies are reserved."

It is currently unknown if the case will go to court.

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