The 62-year-old, who has been battling bowel cancer for the last two years, was also Rovers’ boss from 2017 to 2022.
The news comes after our excusive interview with Mowbray, who told Ross Halls he was ready to get back into football this summer.
“It feels quite amazing!” he told the Rovers website.
“I’ve been back a few times in the past season to watch a few games and it feels like home, especially considering I spent a long time here – five-and-a-half years.
“That’s a long, long time in modern-day football, and we had some good times and felt like we’d built a half-decent team but couldn’t quite get over the line to reach our ambition of getting in the Premier League.
“It almost feels like I’m coming back to finish the job, because the aim of every team in the Championship is to try and get to the Premier League.
“I think you need the energy to do the job and my wife is so happy that this opportunity has come because I’ve been driving everybody mad in the house!
“I’m full of energy, but the highlight of my day has been going out and walking the dog!”
Tony Mowbray has had a two-year battle with bowel cancer (Image: PA)
He added: “Football burns away in me. I can’t wait to get started and I’m looking forward to making new relationships and reinventing the old ones.
“I’m looking forward to meeting the players and I’m hoping they’re all full of energy and desperate to do well.
“I’m looking forward to it, I know the responsibility of being the head coach at a club like this and I am here to make people proud.”