The BMW Sauber team will retain both Robert Kubica and Nick Heidfeld in the 2009 season, the German squad announced on Monday.
The team said Christian Klien will stay on as a test driver.
"We see Nick and Robert as a strong driver pairing and Christian as an experienced test driver," said BMW motorsport boss Mario Theissen.
"We are in no doubt that we will again achieve our ambitious aims with them in the team's fourth year."
The announcement ends weeks of speculation regarding the future of Heidfeld, who was yet to be confirmed at the team.
The confirmation also closes to door to Fernando Alonso, who had been linked with a move to BMW. Now the Spaniard has Renault and Honda as his only options for 2009.