Blake Lively and Ryan Reynolds are hitting back at Lively's "It Ends with Us" co-star Justin Baldoni, after the actor's legal team released behind-the-scenes footage from the controversial film.

Before Tuesday's letter, Lively and Reynolds' legal team sent a cease-and-desist letter to Baldoni's attorney, Bryan Freedman, in December, requesting that he refrain from making "defamatory and ...