Five full-time rookies will contest the 2018 Supercars season with Jack Le Brocq becoming the final driver to be locked in.
Le Brocq, 25, will replace dual Bathurst winner Will Davison at Holden outfit Tekno Autosports after an impressive run of 11 race wins in three seasons in the second-tier Super2 Series.
Le Brocq's signing rounds out the 26-strong drivers' list for the new season which starts in early March in Adelaide.
Le Brocq will join fellow full-time rookies James Golding, Richie Stanaway, 2017 Super2 champion Todd Hazelwood and Anton De Pasquale.
Le Brocq has enjoyed co-driver Supercars endurance-round stints with Todd Kelly and Cameron Waters, the latter pair finishing fourth in 2016 at Bathurst.