The pace bowler has secured 309 Test scalps in 71 appearances with an stellar bowling average.
Australia's chief selector George Bailey has declared that skipper Cummins will be a central figure in the forthcoming Ashes series.
Speculation had been growing that the 32-year-old might sit out due to a ongoing back issue that had not yet healed.
Initial reports from the squad suggested no official announcement had been made regarding whether he would play, with the Test matches set to start on November 21 in Western Australia.
He revealed that the captain is progressing and was "optimistic" about the prospects of taking part.
"It's clear that time is getting short and there are permutations at play, not only the back issue, but additional elements," the selector added.
"It's positive. We firmly believe that he's going to play a key capacity. Hopefully from the opening match. Should that not happen, we'll reassess."
Previous Setbacks
Cummins was ruled out the ODI and T20 games against New Zealand and India in the previous weeks after scans revealed a stress reaction in his back.
Previous incidents include of back injuries, with flare-ups in several earlier campaigns forcing him out of several home seasons in four years.
He emphasized he would be proactive in his approach in his rehabilitation process to make the squad for the Ashes.
The selector indicated that it was unclear if the captain had resumed bowling as part of his rehabilitation but acknowledged it was "pressing" for him to recover fully for the initial match.
Alternative Arrangements
Should Cummins not be fit, former captain Steve Smith will assume leadership.
Versatile player Green was withdrawn recently from the national team for their ODI contests against India as a precautionary measure because of an abdominal issue.
Bailey described it as a "slight concern and confirmed that he's scheduled to appear in the Sheffield Shield, so will be "ideally positioned to resume bowling."
"We put so much time has gone into developing the strategy for him to be available for the first Test as an dual-role player," Bailey explained.
"His involvement was limited to the initial matches anyway. The way he swings the willow in shorter formats, even if it just sets him back for a short period, the choice was made to take a cautious route."
Fixture Details
The Ashes: Australia v England
Spanning from late 2025 to early 2026
