The 74-year-old British funnyman who, alongside Michael Palin, John Cleese, Terry Gilliam, and Graham Chapman formed the iconic surreal comedy group, has been told by doctors he has primary progressive aphasia - a type of dementia affecting the brain's frontal lobe, reported BBC.
A spokesman for the writer, director and actor announced the sad news after it was revealed he would be honoured with a lifetime achievement gong at the British Academy of Film and Television Arts (BAFTA) Cymru (Wales) Awards.
"This illness affects his ability to communicate and he is no longer able to give interviews. Terry is proud and honoured to be recognised in this way and is looking forward to the celebrations."
Organisers are still hoping Terry will attend the event but it is thought he will be accompanied by a family representative and won't give a speech.
Hannah Raybould, Director of BAFTA Cymru, said the gong was to celebrate the Welsh born comic's work since the 1960s.
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