Justin Baldoni is taking legal action against his "It Ends With Us" co-star and her husband in a lawsuit he filed on Thursday.

LOS ANGELES (AP) — “It Ends With Us” actor and director Justin Baldoni has sued his co-star Blake Lively and her husband, “Deadpool” actor Ryan Reynolds, for defamation and extortion on Thursday in the latest move in a bitter legal battle surrounding the dark romantic drama.

"It is not strange that Ryan Reynolds was named in light of Baldoni's theories in the complaint," a defamation attorney tells Yahoo Entertainment.

Escalating his litigiousness, Baldoni has sued Lively and her husband Ryan Reynolds for $400 million, alleging that the power couple stole control of Baldoni's film as a director and orchestrated an effort to destroy his career and reputation with what he's referring to as false allegations of sexual assault.

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Baldoni’s lawyer, Bryan Freedman, had said for weeks he planned to file a suit against Lively, Baldoni’s co-star on “It End With Us,” and Reynolds, Lively’s husband.

The lawsuit is the latest legal action in a feud tied to the 2024 film “It Ends With Us,” which starred Ms. Lively and Mr. Baldoni, who also directed the film.

Blake Lively responds to Justin Baldoni's $400 million lawsuit, accusing him of using the legal move as retaliation against her sexual harassment allegations. Baldoni claims Lively and Ryan Reynolds conspired to gain control of the film 'It Ends With Us'.

Justin Baldoni, director of It Ends With Us, sues co-star Blake Lively and her husband Ryan Reynolds, sparking a major legal dispute.

Lively's legal team spoke up hours after Baldoni filed a suit against her and her husband, Ryan Reynolds, over what transpired on the set of 'It Ends With Us' and in the weeks following the movie's release.