Melbourne Storm will take on either the Sharks or Panthers at AAMI Park next Friday night for a spot in the 2018 NRL Grand Final.
The Preliminary final will kick off at 7.50pm with a massive sea of purple expected to cheer on the Victorian side as they chase a place in their third successive decider.
The game will also be Billy Slater's last in Melbourne.
Storm earned a week off and the right to host the Preliminary Final after defeating the Rabbitohs in thrilling circumstances on Friday night.
A Cameron Munster field goal in the dying moments sealed an incredible win in front of an electric crowd at AAMI Park.
Ticket on-sale dates will be confirmed early this week.
NRL Telstra Premiership Finals Series schedule
Semi Final 1: Friday, September 14, 7.50pm, Allianz Stadium
Cronulla-Sutherland Sharks v Penrith Panthers
Semi Final 2: Saturday, September 15, 7.50pm, ANZ Stadium
South Sydney Rabbitohs v St George Illawarra Dragons
Preliminary Final: Friday, September 21, 7.50pm, AAMI Park
Melbourne Storm v Winner of Semi Final 1
Preliminary Final: Saturday, September 22, 7.50pm, Allianz Stadium
Sydney Roosters v Winner of Semi Final 2