Diane Lane Signs On As Martha Kent In Superman

The Unfaithful actress is set to take on the role of Superman's mother.

Warner Bros. Pictures has just announced that Oscar-nominated actress Diane Lane (Unfaithful) has signed on to play the Man of Steel's adoptive mother, Martha Kent, in Zack Snyder's reboot of Superman.

Snyder gave his thoughts on the announcement:

"This was a very important piece of casting for me because Martha Kent is the woman whose values helped shape the man we know as Superman. We are thrilled to have Diane in the role because she can convey the wisdom and the wonder of a woman whose son has powers beyond her imagination."

According to the press release, the only other confirmed casting is Henry Cavill's Superman. We're under the assumption that Kevin Costner is still in final negotiations for the role of Jonathan Kent, but that will likely be made official in the coming days or weeks.

The untitled Superman film will hit theaters December 2012.