Diane Lane may know all the secrets from the new “Superman” script, but she couldn’t spill them to Jay Leno on last night’s “Tonight Show.” When asked about the blockbuster, Lane, who will play Martha Kent, said, “I’m not allowed to talk about it. It’s top secret.”

“I had to read the script under lock and key in a room,” Lane said of the film, which will star Henry Cavill as the man of steel. “You go to the offices and it’s a locked door. And the curtains are drawn.” While I understand the locked door, drawn curtains seem a little bit much. Just me?