This is the packaging art for Mattel's DC Multiverse "Dark Knight Returns" Joker:
It is not drawn by Frank Miller.
Oh, the art is based on Miller's artwork, but it's not his. The bulk of the body is taken from his introduction on the talk show, while the face is a retouched version of a panel from when he goes to visit Catwoman, both flipped horizontally:
Was there really no actual art they could use?