Josh Duhamel fears none of the original Transformers cast will be involved in an upcoming fourth installment of the robot movie franchise - because he has yet to receive a call from director Michael Bay.

The filmmaker announced plans for another Transformers sequel on Tuesday (14Feb12), and his producer pal Lorenzo di Bonaventura revealed it would be a new take on the popular brand.

Leading star Shia LaBeouf is not expected to return after insisting he was done with the hugely-successful action series following the release of last year's (11) Transformers: Dark of the Moon, and now Duhamel admits he and his co-stars Tyrese Gibson and Rosie Huntington-Whiteley are unlikely to be a part of the Transformers' future either.

He tells Eonline.com, "I don't think anybody's doing it. I know Shia's not doing it. I don't think Tyrese or Rosie or anybody else is doing it."

But Duhamel is not surprised studio executives are rolling out another sequel, because Dark of the Moon's $1.12 billion worldwide gross made it the fourth highest-grossing film in movie history.

He says, "Whenever these movies make that much money they're going to make as many as they can. (But) I haven't heard anything about it. They haven't called me."

Huntington-Whiteley replaced Megan Fox as LaBeouf's onscreen love interest for the third installment of the franchise.

The next Transformers movie is scheduled to hit theatres in June, 2014.