Washington, Aug. 23 -- More than two decades after 'National Treasure' first hit screens, a third film in the Nicolas Cage-led adventure franchise is officially in development, director Jon Turteltaub has confirmed.

Turteltaub, who directed the 2004 original and its 2007 sequel, 'National Treasure: Book of Secrets' has confirmed the news, as per E! News.

"I was thinking about mentioning this tonight; I'll say it tonight," Turteltaub revealed, adding, "It's happening. You're the first people I have said this out loud to," as quoted by E! News.

The director then declared, "It's finally real."

Turteltaub also revealed that a script for the third instalment has been written and approved by both him and Disney. According to the director, t...