Shia LaBeouf is desperate to star in the Transformers sequel.
The 21-year-old actor wants to reprise his role as heroic Sam Witwicky in Transformers 2, which is already being developed by executives at Dreamworks film studios.
Dreamworks spokesman Daniel Levy said: "Obviously if you have a movie that's made as much money as Transformers, you'd want to do another one.
"Things are moving along, but until everyone says, 'Now we have everything - we have the script and everybody tied in', we can't say it has the green light yet."
Michael Bay is expected to reprise his role as director, with Steven Spielberg as executive producer.
Transformers, the big screen adaptation of the hit 80s animated TV series, was released this summer and took almost USD700 million at box offices worldwide.
The film focused on a clash between rival robot clans the heroic Autobots and the evil Decepticons.
LaBeouf's co-stars Megan Fox, Josh Duhamel and Jon Voight are yet to confirm if they plan to sign up for the sequel.
Fox, 21, played LaBeouf's love interest Mikaela Barnes, with Duhamel portraying valiant soldier Captain Lennox, and Voight taking the role of US Defense Secretary John Keller.
Transformers 2 is set to be released in 2009.