Reece Donnelly, who appeared on the hit BBC show last year is also the founder of the Theatre School of Scotland.
He is supporting Spina Bifida Hydrocephalus Scotland (SBHS), a charity supporting and informing all those affected by the conditions.
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Reece Donnelly said: “Stepping up as an ambassador for SBHS has me buzzing with excitement.
“Over the past year, we’ve supported from afar with our Theatre School of Scotland flash mobs and performed at loads of key events. But guess what?
“It’s time to fly right into the role as an ambassador and raise as much funds as possible for this amazing cause.
“I’ve had the incredible opportunity to meet some of the young people supported by this charity, and let me tell you, I can’t wait to do as much as I can.
“I’m ready to spread awareness of those facing challenges every day and take my fundraising game to superhero levels for them! Together we can make a difference for all the amazing young people and families who need our support more than ever at SBHS.”
Lawrence Cowan, chief executive of the charity, said: “We are thrilled to welcome Reece as our ambassador.
“Reece’s passion, energy, and dedication to making a positive difference align perfectly with our mission at SBHS to empower all those born with these rare and complex disabilities to live life to the full.
“Reece’s commitment over the past year has already been invaluable, and we are excited to see how his increased involvement will inspire others.”