was one of several teams to enter the new GP2 Series in 2005. In the team's debut season, it employed F3 Euroseries graduates Alexandre Prémat, of France, and Nico Rosberg, of Germany. Against drivers who had prior experience at this level, from Formula 3000, Rosberg became the inaugural GP2 Drivers' Champion. He showed consistency, with points scoring results at every race meeting, and his championship challenge became stronger as the year progressed. Prémat was 4th in the championship, which was enough to provide ART with the Teams' Championship title. Rosberg's increasingly rapid rise to the top continued when he graduated to Formula One with Williams. Prémat remained with ART in 2006, and was joined by Britain's Lewis Hamilton. He was a logical choice, having dominated the F3 Euroseries with ASM Formule 3, ART's sister team. Hamilton took an impressive title in his debut season, though his performances faltered slightly mid-season against an increased challenge from the eventual runner-up, Nelson Piquet Jr. Prémat was a consistent and reliable number two to Hamilton; his third position in the Drivers' Championship contributed to ART's second consecutive Teams' title. For the 2007 season, ART signed Michael Ammermüller and Lucas di Grassi. Ammermüller's campaign was hampered by injury, and he was later dropped in favour of Sébastien Buemi, with Mikhail Aleshin also deputising. Di Grassi emerged as the team's leader, his consistent finishing record allowing him to finish as runner-up in the drivers' championship to Timo Glock despite winning only a single race. The points he accumulated also allowed ART to salvage second in the teams' championship, in spite of the fact that the drivers of the team's other car scored a mere ten points between them. ART's driver line-up changed again for 2008, with the experienced Luca Filippi partnered by series rookie Romain Grosjean. Grosjean quickly established himself as the number one, winning two races and taking several additional podium finishes en route to fourth in the drivers' championship, only 14 points behind champion Giorgio Pantano. By contrast, Filippi was dropped after scoring points just twice in the first half of the year; he was replaced by Sakon Yamamoto, who also failed to trouble the leading runners despite his Formula One experience. The team slipped to fifth in the championship. The 2009 season saw another complete overhaul of the team's driving strength, with Pastor Maldonado joining from Minardi Piquet Sports and Nico Hülkenberg graduating