Former Manor Formula 1 driver Will Stevens will follow John Booth and Graeme Lowdon into the World Endurance Championship this year.
Stevens missed out on an F1 seat with Manor Racing in 2016, as the team elected to enlist Pascal Wehrlein and Rio Haryanto.
The British driver will switch to sportscars with his former F1 team bosses, as Booth and Lowdon move to the WEC and Le Mans 24 Hours' LMP2 class as Manor Motorsport.
"The opportunity to continue my relationship with Graeme and John was one that I was very pleased to accept," Stevens said.
"It gives me a great chance to explore endurance racing, be competitive and go racing with people I enjoyed working with last year so I'm looking forward to it.
"My objective is to have a number of top level career choices going forward, and to be able to gain experience in endurance racing will hopefully open up my career prospects.
"I want to keep very busy, enjoy my racing and do some winning and I'm confident that by working again with Manor in WEC I'll achieve all of those things."
Manor originally announced it would run one ORECA-Nissan 05 this year, but has expanded its plans and will now field a second.
Stevens joins former Manor F3 driver Tor Graves as a confirmed driver.
"Everything has moved very quickly since we first announced that we would be entering the 2016 World Endurance Championship," Booth said.
"It is great news to be running an additional ORECA 05 LMP2, we can't wait to get started with the season at the prologue at the end of March.
"It's great that Will is joining the team, we know his talent and speed from working with him over the last few years in Formula 1 and we are all really looking forward to going racing with him."