The pace bowler has taken 309 Test scalps in 71 appearances with an stellar bowling average.
Australia's chief selector Bailey has declared that pace spearhead Cummins will have a crucial role in the upcoming historic rivalry.
There were concerns that Cummins might miss the series due to a persistent back stress problem that had not yet healed.
Earlier indications from the Australian camp suggested no official announcement had been made regarding whether he would play, with the extended contest kicking off on 21 November in Perth.
He revealed that Cummins is "building up" and was "optimistic" about the prospects of taking part.
"We're aware that the clock is ticking and multiple considerations at play, not only the back issue, but additional elements," the selector added.
"We're encouraged. We firmly believe that he's going to play a key capacity. With luck it's the first Test. If not, then we'll pick it up."
Injury History
Cummins was ruled out the white-ball matches against India and New Zealand recently after medical tests showed a stress reaction in his back.
Previous incidents include of back injuries, with flare-ups in 2012-13, 2013-14 and 2015-16 causing him to miss multiple domestic campaigns in a limited period.
Cummins stated he would be ""aggressive" and "take risks" in his rehabilitation process to secure his spot for the series.
He mentioned that there was no confirmation if he had started his bowling workouts as part of his rehabilitation but conceded it was "getting tight" for him to recover fully for the opener.
Alternative Arrangements
If he's unavailable, veteran batsman Smith will assume leadership.
The talented all-rounder was recently pulled out from Australia's squad for their one-day international series against the Asian giants as a precautionary measure because of an abdominal issue.
The selector characterized it as a "minor" injury and confirmed that he'll feature in the domestic first-class competition, so will be "in a good place to be ready to bowl."
"Extensive planning has gone into developing the strategy for him to participate for the opening match as an batting and bowling option," he elaborated.
"His involvement was limited to the starting games in any case. How he handles the bat in limited-overs, should it hinder progress for a short period, we opted to adopt a safer strategy."
Series Schedule
Australia vs England: The Ashes
From November 21, 2025 to January 7, 2026
