Lotus F1 team principal Tony Fernandes has revealed on social networking site Twitter, that the F1 newcomers have signed their first driver for the 2010 F1 season - but hasn't revealed who it is...

That will lead to increased speculation over who the driver could be, with a number of names having been suggested as possibilities after the initial confirmation that the team had secured a slot on the grid for next season.

Jarno Trulli has been hotly tipped to a drive but could be one of three ex-Toyota men in contention with Timo Glock in discussions with a number of teams and Kamui Kobayashi also looking to secure a race seat on the grid after his impressive showing in the final two races of the year.

Jacques Villeneuve is known to be looking for a route back into the sport, while McLaren's Heikki Kovalainen could be another possible option should he leave the Woking-based outfit - a move that looks increasingly likely to happen.

Fairuz Fauzy would provide a Malaysian option for the team, although is expected to be a more likely test driver but there are any number of other drivers who could step in to fill a vacant seat.

So who do you think Fernandes was referring to in his Twitter message ahead of an official announcement?

To vote on who you think has signed a deal with Lotus F1, CLICK HERE.