Spaniard Dani Clos will switch to the Formula Renault 3.5 championship for the Le Mans and Portimao rounds.
Clos, who has been racing in the GP2 Series with the Racing Engineering team this year, will join the Epsilon Euskadi squad for his two World Series outings.
Clos tested the car back in November, although the Le Mans round will be his racing debut in the series.
Fellow GP2 racer Edoardo Mortara will also join the championship at Le Mans, the Italian racing for the Tech 1 team alongside Charles Pic.
Mortara will be replacing Brendon Hartley, who will not be available for the race because the round clashes with the F3 Euro Series race at Zandvoort.