GP2 race winner Jon Lancaster, series returnee Conor Daly and sometime Formula 2 driver Axcil Jefferies have secured the final seats on the GP2 grid for this weekend's Bahrain season-opener.
All three will drive for the teams with which they tested last month, with Lancaster staying on at MP, Daly lining up with Lazarus and Jefferies getting the second Trident drive.
Lancaster told AUTOSPORT after topping Sakhir testing that both he and MP were keen for him to partner Daniel de Jong this year.
Briton Lancaster took two victories with Hilmer last season.
Daly made a one-off appearance with Hilmer in the 2013 Sepang event before focusing on GP3, in which he finished third.
The American, son of former Formula 1 driver Derek Daly, also contested last year's Indianapolis 500 with AJ Foyt Racing.
Daly will join Nathanael Berthon at the Lazarus team.
Zimbabwean 19-year-old Jefferies last raced full-time in the 2012 F2 series, before making two Indy Lights appearances last season.
He completes the Trident line-up alongside race winner Johnny Cecotto Jr.
2014 GP2 line-up: Russian Time Mitch Evans Artem Markelov Carlin Julian Leal Felipe Nasr Racing Engineering Raffaele Marciello Stefano Coletti DAMS Jolyon Palmer Stephane Richelmi ART Stoffel Vandoorne Takuya Izawa Hilmer Daniel Abt Facu Regalia Rapax Simon Trummer Adrian Quaife-Hobbs Arden Rene Binder Andre Negrao Caterham Alexander Rossi Rio Haryanto MP Daniel de Jong Jon Lancaster Trident Johnny Cecotto Jr Axcil Jefferies Lazarus Nathanael Berthon Conor Daly Campos Arthur Pic Kimiya Sato