International footballer Cristiano Ronaldo has recorded a video to encourage people sign up as stem cell donors after discovering that the three year old son of his national team mate Carlos Martins, urgently needs to find a matching donor to save his life.
We particularly need more men aged 18-30 to join the Anthony Nolan register as they are most likely to be chosen to donate.
You can join the register by completing an application online.
Find out more about the donation process and why you should join.