Monty Python star Terry Jones has been diagnosed with dementia

File photo dated 9/12/2015 of Monty Python star Terry Jones who has been diagnosed with dementia. PRESS ASSOCIATION Photo. Issue date: Friday September 23, 2016. Jones, 74, who directed Life Of Brian and Monty Python's The Meaning Of Life, and co-directed Monty Python And The Holy Grail with Terry Gilliam, is suffering from primary progressive aphasia, which affects his ability to communicate. See PA story SHOWBIZ Jones. Photo credit should read: Hannah McKay/PA Wire
File photo dated 9/12/2015 of Monty Python star Terry Jones who has been diagnosed with dementia. PRESS ASSOCIATION Photo. Issue date: Friday September 23, 2016. Jones, 74, who directed Life Of Brian and Monty Python’s The Meaning Of Life, and co-directed Monty Python And The Holy Grail with Terry Gilliam, is suffering from primary progressive aphasia, which affects his ability to communicate. See PA story SHOWBIZ Jones. Photo credit should read: Hannah McKay/PA Wire

The 74-year-old comedian is suffering from primary progressive aphasia, which affects his ability to speak.

Jones was one of the original members of the ground-breaking Python comedy team, which first appeared on television in 1969.

The shows ran for 45 episodes through the 1970s.