World champions Australia face England in a three-match series starting at Wembley on October 25.
Fresh from starring in an NRL grand final win for the Brisbane Broncos, 23-year-old Walsh is poised to earn his first Kangaroos cap alongside rugby union convert Mark Nawaqanitawase.
“This will be one of the most anticipated Kangaroo tours in recent memory,” Australian Rugby League Commission boss Peter V’landys said.
“The return of the Ashes after 22 years is not just a sporting event — it’s a celebration of rugby league’s rich heritage and enduring rivalry between two countries.”
The contest takes its name from the famed biennial Ashes cricket series played between Australia and England.
Australia will be captained by Penrith Panthers forward Isaah Yeo, the 2024 International Rugby League Golden Boot winner.
Cronulla Sharks hooker Blayke Brailey, Canterbury Bulldogs second-rower Jacob Preston, South Sydney Rabbitohs forward Keaon Koloamatangi, Broncos centre Gehamat Shibasaki and Canberra Raiders back Ethan Strange are the other fresh faces.
Former Wallaby Nawaqanitawase was included despite recently announcing he would return to rival code rugby union in 2026.
England have not faced Australia since the 2017 World Cup final, which the Kangaroos won 6-0.
Australia squad:
Forwards: Blayke Brailey, Patrick Carrigan, Lindsay Collins, Reuben Cotter, Angus Crichton, Tino Fa’asuamaleaui, Harry Grant, Keaon Koloamatangi, Jacob Preston, Lindsay Smith, Isaah Yeo, Hudson Young
Backs: Nathan Cleary, Xavier Coates, Tom Dearden, Dylan Edwards, Zac Lomax, Mitchell Moses, Cameron Munster, Mark Nawaqanitawase, Gehamat Shibasaki, Kotoni Staggs, Ethan Strange, Reece Walsh