The 18-year-old has signed an initial 18-month deal at Blackburn and joins the club for an undisclosed fee.
“I’d been playing for Southport and I was aware that scouts had been coming down to watch now and again,” Aley told the club’s official website.
“I’d been down to the Blackburn Academy during last year for a trial, so I was surprised and happy that they were taking a look at me again.
“I was then invited down for a two-day trial at Brockhall and after that they asked me to carry it on.
“And now the deal has been done and I’m delighted. I’m happy everything has been sorted out and I’m really happy to be here.”
“My preferred position is up front, but I can also play on the left or on the right,” he added.
“But I’ll play anywhere on the pitch just to play my football because I enjoy it that much.
“I’ll make sure I’m training hard every day so I can push on and do well for the reserves and then hopefully to try and start training with the first team and we’ll see where it goes from there.”