Singer Charlotte Church is joining the organ donation register after learning of a family friend's battle for survival.
The television presenter, and mother to six-month-old Ruby, voiced her support for organ donation as she met parents of sick children at the Children's Hospital for Wales in Cardiff.
She became involved in the issue after speaking to the parents of 20-month-old Finlay Careless, who has liver disease and is due to go onto a liver transplant list. Ms Church's mother Maria is a family friend of his father, 40-year-old Julian Careless.
Speaking as she was holding six-and-a-half-month-old Logan Donegan, who needs liver and bowel transplants, Ms Church said: "I wanted to get the message across to donate organs. I'm definitely going to do it myself.
"It's so important. A little baby like this can benefit so much. It would mean so much to these two little boys. It's something that everyone should do."
Finlay's mother Sarah Howells, 33, said she was in favour of an opt-out, rather than opt-in, organ donor register.
She added: "It's a procedure that is in place across the rest of Europe. Seven out of 10 people would like to give their organs, but only two out of 10 are on the register.
"I'm hoping Charlotte's support will make a big difference."
Ms Church said she liked the idea of an opt-out scheme, and added: "I can't imagine what it's like for a mother like Sarah to have to sit and wait. The child could deteriorate while you're waiting."
Ms Church said she had changed her mind about the issue since becoming a mother, and said a year ago her opinion would have been: "I'm keeping my organs".
