While some fans are getting ready for the release of Marvel's Ant-Man in just a few weeks, others are still checking out Avengers: Age of Ultron in theaters, which has amassed a whopping $1.37 billion at the worldwide box office after two months. Earlier this week, concept artist Andy Park shared some of his early designs for the villainous Ultron on his Facebook page. Here's what he had to say about the artwork.

"Finally getting around to posting some of the Avengers: Age of Ultron concepts I did. These are some initial passes done for the big baddie, Ultron. What a crazy fun project to work on! I don't get to do the more robotic designs that often here given our resident robot experts in Ryan Meinerding, Phil Saunders, along with Josh Nizzi and Josh Herman. But when I do get a chance I just savor the moment. Too much fun!"

The third photo shows the actual approved version of Ultron's Mark 1 design, which is the form he takes when we first see him in the movie. The other images showcase different designs for the villainous Ultron, portrayed by James Spader, in his final form, which are much more sinister that the design used in the film. Andy Park previously worked on other Marvel movies such as Guardians of the Galaxy and Thor: The Dark World. What do you think about this concept art?

<strong><em>Avengers: Age of Ultron</em></strong> Concept Art 1

<strong><em>Avengers: Age of Ultron</em></strong> Concept Art 2

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<strong><em>Avengers: Age of Ultron</em></strong> Concept Art 3

<strong><em>Avengers: Age of Ultron</em></strong> Concept Art 4

<strong><em>Avengers: Age of Ultron</em></strong> Concept Art 5

<strong><em>Avengers: Age of Ultron</em></strong> Concept Art 6