Certifiably crazy, possibly stupid, definitely love.

Warner Bros. is moving ahead with a "Joker and Harley Quinn" movie with Margot Robbie and Jared Leto reprising their Suicide Squadroles -- and the directing duo of Glenn Ficarra and John Requa (Crazy, Stupid, Love) are onboard to helm it.

THRbroke the news, which WB had yet to confirm Tuesday.

Ficarra and Requa, the directors and executive producers of This Is Us, are in final talks to both helm and write, THRhollywood reports. But maybe don't hold your breath -- word is that Harley and Joker would come after the sequel to Suicide Squad, which is struggling mightily to land a director; whoever that is will have a helluva time hitting the film's 2019 target.

THR calls HarleyJoker a "criminal love story," which is like calling Man of Steel a superhero story.

Duh.

Unlike the standalone, out-of-continuity Joker origin story we reported last night, Jokarley supposedly will fall within the DCEU's established timeline. Which means another cameo for Battfleck, right?