Confirmation of Garry Jacobson's signing at Team Sydney means the 2021 Repco Supercars Championship grid is complete.
Jacobson fills the vacancy alongside Fabian Coulthard, who has moved from Dick Johnson Racing.
Team Sydney enters 2021 as one of three teams with an all-new driver line-up, alongside DJR and Erebus Motorsport.
Triple Eight Race Engineering, Walkinshaw Andretti United, Brad Jones Racing and Team 18 will all field unchanged line-ups.
On Saturday, Kelly Grove Racing confirmed David Reynolds will replace the retiring Rick Kelly.
Tickford Racing, meanwhile, downsized to three cars following the exit of Lee Holdsworth. However, its three remaining drivers all drove for the team last season.
Matt Stone Racing has elevated Zane Goddard and Jake Kostecki, who shared the #34 entry in 2020, to full-time campaigns in 2020.
That forced Jacobson out the door at MSR, but he has been snaffled by Jonathon Webb's Tekno-led squad.
While all 24 full-time drivers have been confirmed, several co-driver slots are yet to be locked in.
Garth Tander and Craig Lowndes will return to Triple Eight, while Michael Caruso and James Golding will line up for Team 18.
Tim Blanchard will share his CoolDrive Racing entry with recruit Tim Slade, Thomas Randle returns to Tickford, while IndyCar-bound Scott McLaughlin is slated to return for DJR.
The new-look grid will make its first competitive appearance at the 2021 season opener, the Mt Panorama 500, across February 26-28.
2021 Repco Supercars Championship grid
Dick Johnson Racing
Anton De Pasquale
Triple Eight Race Engineering
Shane van Gisbergen
Jack Le Brocq
Blanchard Racing Team
Walkinshaw Andretti United
Brad Jones Racing
Matt Stone Racing