Suicide Squad ( 2016 ) is a film .
The Joker has been adapted to serve as Batman 's adversary in live-action , animated , and video game incarnations , including the 1960s Batman television series played by Cesar Romero and in films by Jack Nicholson in Batman ( 1989 ) , Heath Ledger in The Dark Knight ( 2008 ) and Joaquin Phoenix in Joker ( 2019 ) .
Joker -LRB-character-RRB-