The third round, the Chinese Grand Prix in Shanghai on April 14, will be the 1000th world championship F1 race.
Daniel Ricciardo defects from Red Bull to Renault, replacing Carlos Sainz, who moves to McLaren in place of Fernando Alonso after the two-time champion left F1.
Robert Kubica also rejoins the F1 grid, after a much longer absence of eight years, with Williams.
Formula 2 champion George Russell will partner Kubica while Lando Norris replaces Stoffel Vandoorne at McLaren. Alexander Albon will be the third rookie, joining Toro Rosso in place of Brendon Hartley.
Lance Stroll has moved from Williams to Racing Point at the expense of Esteban Ocon, after his father Lawrence bought the team – formerly known as Force India – last August.
Red Bull Racing switches to Honda engines for 2019, joining its sister team Toro Rosso.
2019 Formula 1 car launch dates
Nikita Mazepin, Force India VJM11
Photo by: Joe Portlock / LAT Images
2019 Formula 1 testing schedule
|February 26-March 1||Barcelona|
Lewis Hamilton, Mercedes-AMG F1 W09 EQ Power+ leads at the start of the race
Photo by: Sutton Images
2019 Formula 1 calendar
Drivers and grid kids observe the National Anthem on the grid
Photo by: Mark Sutton / Sutton Images