Blackmore, Irwin, David May and ex-Celt Brian McClair will all jump in the saddle at various points over the eight-day challenge to ride the 592 miles from Mizen Head in Cork to Malin Head.
Funds raised by participants in the Big Red Bike Ride will help assist Manchester United Foundation, Irish Autism Action and Hearts & Minds Challenge continue to deliver life-changing services.
Although Irwin told ManUtd.com he’s “not a cyclist at all”, the Reds legend, now 46, is looking forward to the challenge.
“It’s a great opportunity to see the best parts of Ireland and raise some money,” he said. “I’ve seen quite a bit of Ireland before but never on a bike! I go to the gym quite a bit and I run, but I’m not a cyclist at all.
“I’ll have to do a little bit of training. You always get a few who think it’s the Tour de France, but it’s just to raise money so I’ll be back in the pack and enjoying it. I hope lots of supporters join us because it should be an inspiring experience in aid of charities that do so much work to support children and families.”
For more information, or to get involved in the Big Red Bike Ride, visit www.heartsandmindschallenge.org