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Pratchett to star in Alzheimer's ad

Sir Terry Pratchett is posthumously starring in a hard-hitting TV ad campaign waging war on Alzheimer's - the disease which he died from in March this year.

The author and several other famous faces including Hollywood actor Seth Rogen and James Nesbitt, have joined forces for Alzheimer's Research UK's Fightback campaign. Rogen, whose mother-in-law is living with the disease, said: "Alzheimer's is a global challenge and it doesn't respect ethnicity or wealth."