American Formula One team Haas have retained Romain Grosjean and Kevin Magnussen for the 2019 season.
Frenchman Grosjean, 32, who has been with the outfit since it's inception, has recovered from a poor start to the year to be kept on for a fourth season.
Magnussen, the 25-year-old former McLaren driver, has steadily impressed in his first campaign with the team.
Haas are fifth in the constructors' standings ahead of this week's Russian Grand Prix.
Haas' announcement leaves Toro Rosso, Force India and Williams to confirm their line-ups for next year.
"It's impressive to see what this team has accomplished in such a relatively short time, and for someone who has been here since the very beginning, I take a lot of pride in the time, effort and sacrifice we've all put forth to make Haas so competitive," Grosjean said.
Dane Magnussen added: "I've never been in a better situation than the one I'm in here at Haas F1 Team. This is a team filled with racers and we're all striving for the same thing. There's no bureaucracy and everything is very straightforward."