Marvel is known for their somewhat unorthodox casting choices over the years. Before Iron Man became a massive blockbuster, Robert Downey Jr. was considered a controversial choice to lead a big-budget franchise. Of course, it all turned out just fine, with the 2008 movie launching Robert Downey Jr.'s career into the stratosphere. Now, according to an unconfirmed report, the actor wants to bring in his old friends Mel Gibson and Jodie Foster to co-star in Avengers: Age of Ultron.

Here's what an unidentified source has to say about Robert Downey Jr.'s efforts to bring Mel Gibson and Jodie Foster on board for the highly-anticipated sequel.

"Robert is raising eyebrows with his efforts on behalf of his longtime best pals Jodie Foster and Mel Gibson. He wants to bring Mel and Jodie into the Marvel universe, preferably in one of the Avengers films. It's been a longtime dream of Robert's to help Mel and Jodie reach similar big box office heights like the ones he's achieved in recent years."

While casting Jodie Foster would reportedly be "no problem" for Marvel, Mel Gibson is a different story, due to his much-publicized anti-Semitic rant in 2006.

"Marvel is run by one of the richest and most prominent Israeli businessmen in Hollywood, and you can be sure even if Robert got down on his knees and begged, there's no place for Mel in the Marvel films."

Robert Downey Jr. reportedly pitched the idea of Mel Gibson playing the U.S. President in Iron Man 3, but that idea was shot down, with the role eventually going to William Sadler. However, the unnamed source reveals that Robert Downey Jr. will keep pushing to get his friends hired.

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"Robert is very big into working with his friends. Ashley Hamilton and Iron Man 3 director Shane Black both credit him with making the final push to get them hired."

Robert Downey Jr. has a lucrative five-year deal with Marvel Studios, which includes returning as Tony Stark in Avengers: Age of Ultron and The Avengers 3, along with consulting on future Iron Man movies. Would you like to see Mel Gibson or Jodie Foster in Avengers: Age of Ultron? Let us know!