Nicholas Hitchon, Who Aged 7 Years at a Time in ‘Up’ Films, Dies at 65 (opens in new tab)

Also: https://engineering.wisc.edu/blog/remembering-professor-will...

Sad news, in 63 Up he was quite sick and said he probably wouldn’t make it to 70. After Lynn Johnson he’s the second person to die in the group.

If you haven’t watched the Up series I would recommend it, watching the growth of the people in the group and their personal journeys is fascinating.