Baldoni, in a lawsuit filed in New York federal court on Thursday, alleges extortion, defamation and claims related to breach of contract, among several others. He’s joined by his film studio, Wayfarer, and its chief executive Jamey Heath, and their public relations representatives, Melissa Nathan and Jennifer Abel. They seek at least $400 million.

Justin Baldoni told TMZ he's 'grateful to be with the family' amid his lawsuit against his 'It Ends with Us' costar Blake Lively and husband Ryan Reynolds

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.