BACKGROUND: Formula One teams and their drivers in 2012

Jan 17, 2012, 13:00 GMT

Berlin - The signing of Bruno Senna by Williams on Tuesday has all but completed the driver line-up for the 2012 Formula One season, with only one seat at HRT still vacant ahead of the March 18 start in Australia.

Red Bull: World champion Sebastian Vettel has a contract until 2014 and Mark Webber has had his renewed for 2012.

McLaren: Jenson Button has signed a new multi-year deal and Lewis Hamilton's contract runs until the end of the season.

Ferrari: Fernando Alonso wants to stay at the team for the rest of his career, Felipe Massa has another contract for the season.

Mercedes: Nico Rosberg has a contract until 2013, Michael Schumacher's three-year deal expires after the 2012 season.

Lotus Renault: Kimi Raikkonen comes out of F1 retirement and their other driver Romain Grosjean is also new.

Force India: Nico Hulkenberg is promoted from test driver and Paul di Resta is in his second season at the team.

Sauber: Kamui Kobayashi and Sergio Perez are the drivers as in 2011.

Toro Rosso: Two new drivers in the form of Daniel Ricciardo and Jean-Eric Vergne.

Williams: Bruno Senna takes the place of Rubens Barrichello and Pastor Maldonado is in his second season at the team.

Caterham: Jarno Trulli and Heikki Kovalainen remain the drivers at the team formerly named Lotus.

HRT: Pedro de la Rosa is a new driver and his team-mate yet to be determined.

Marussia: Timo Glock stays at the outfit formerly known as Virgin, and his new team-mate is Charles Pic.