Formula Renault 3.5 drivers Esteban Guerrieri and Jake Rosenzweig are to race in Auto GP at this weekend's Magny-Cours meeting.
Guerrieri takes over Charouz Gravity Racing's #4 entry, which has been raced by Tomas Kostka, Stefano Coletti and Natacha Gachnang at the three events held so far.
The 25-year-old Argentinean, whose FR3.5 title bid was recently hampered by his ISR having to miss the Hungaroring with chassis damage, joins regulars Jan Charouz and Adrien Tambay in the team.
American driver Rosenzweig will return to his former GP2 Asia team Super Nova for his Auto GP debut at Magny-Cours, replacing Giorgio Pantano alongside Jonny Reid.
Pantano has switched teams to Euronova this weekend while its regular driver Luca Filippi steps into Super Nova's GP2 line-up in place of the injured Josef Kral.