It's a matchup Lillyman is relishing and it will help knowing the Origin selectors will be watching his performance closely.
"The biggest thing is knowing you are thereabouts and in their minds," Lillyman said. "Had I not been called up and had a chat to [coach] Mal [Meninga] I wouldn't know where I was in the mix. It's a bit of a feather in the cap."
Winger Manu Vatuvei and Packer are doubts for Sunday's game. Both have been included in the side to face the Rabbitohs in the hope they will be fit to play but Elliott has named an extended seven-man bench to cover all options. That includes Ngani Laumape, who would replace Vatuvei, and backup props Matagi and Charlie Gubb.
South Sydney and former Kiwis captain Roy Asotasi has announced he will leave the NRL at season's end to join English Super League club Warrington.
Warriors
Side to play Souths at NIB Stadium, Perth, Sunday 8.30pm
* Kevin Locke
* Glen Fisiiahi
* Dane Nielsen
* Konrad Hurrell
* Manu Vatuvei
* Thomas Leuluai
* Shaun Johnson
* Sam Rapira
* Nathan Friend
* Ben Matulino
* Feleti Mateo
* Simon Mannering
* Elijah Taylor
Reserves: Russell Packer, Jacob Lillyman, Todd Lowrie, Dominique Peyroux, Ngani Laumape, Suaia Matagi, Charlie Gubb.