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

What started as creative differences has escalated into a courtroom battle, with Justin Baldoni filing a $400 million lawsuit against Blake Lively.

Justin Baldoni has filed a lawsuit against his ‘It Ends With Us’ co-star Blake Lively, and her husband Ryan Reynolds, for $US400 million ($AU644 million).

Justin Baldoni's lawyer Bryan Freedman fired back at Blake Lively's response to the director's $400 million lawsuit. "After my clients filed a comprehensive lawsuit packed with almost 200 pages of undeniable facts and documentary evidence which crushed their false allegations of a smear campaign by providing doctored communications to The New York Times,

Justin Baldoni and Blake Lively's legal battle heat up as the actor's lawyer launches a scathing rebuke of Lively's latest legal statement.

On Thursday, the “Jane the Virgin” star filed a bombshell lawsuit against his “It Ends With Us” co-star and her husband, Ryan Reynolds.

In this Deadline exclusive, it is clear the ever growing legal war between the It Ends With Us stars is getting more & more personal as more lawsuits

As per Justin Baldoni’s lawsuit, Taylor Swift’s surprise appearance during a meeting with Blake Lively pressured him to accept her script revisions

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

"It Ends With Us" director and actor Justin Baldoni filed a lawsuit on Thursday against his co-star Blake Lively, adding another layer to the legal saga between the pair that began in December.

Baldoni, who had previously hinted at more legal action, filed a $400 million lawsuit against Lively, her husband Ryan Reynolds, the actress's publicist Leslie Sloan and the couple's publicity firm Vision PR. As spelled out in 179-page lawsuit, filed by Baldoni’s attorney in New York, Baldoni is suing Lively, Reynolds and Sloan for: