Blake Lively filed a legal complaint against her "It Ends with Us" costar, Justin Baldoni.Jeff Spicer/NBC/Getty Images"It Ends with Us" star Blake Lively filed a legal complaint against Justin Baldoni, her costar and the film's director.Lively accused Baldoni of sexual harassment, retaliation, and attempting to damage her reputation.Baldoni's attorney said the claims made in Lively's lawsuit were "completely false" and "intentionally salacious.""It Ends with Us" star Blake Lively has filed a legal complaint against the film's director and her costar, Justin Baldoni, for sexual harassment.Lively and Baldoni dominated entertainment headlines this summer as they promoted "It Ends with Us," a romantic drama based on Colleen Hoover's book.