Warner Bros. announced this week that Secretariat star Diane Lane, 45, has signed on to play Martha Kent, the only mother Clark Kent has ever known, in the new Superman movie to be directed by Zack Snyder. Snyder stated, “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.” Lane will star with British actor Henry Cavill, 27, who was announced earlier this year as Clark Kent/Superman. Superman: Man of Steel is slated for release in December 2012.