Sure is. Joker is a comic book movie that delves deep into the psyche of the iconic character, offering a unique and compelling take that stays true to the comic book roots.
In most versions, Joker doesn't seem to have that awareness. His focus is on causing mayhem and chaos without considering the meta aspect of being in a comic book. It's part of what makes his character so wild and unhinged.
The comic book Joker is quite old. He made his debut in the 1940s and has remained a popular and enduring character since then. His age in the comic book universe is difficult to pin down exactly, but he's been a staple for decades.
Well, start with a white base for the face. Then, add bold black around the eyes and mouth for that creepy look. Finish with some green hair color if you want.