Zohra Sehgal
From Tardis Wiki, the free Doctor Who reference
Zohra Sehgal (27 April 1912-10 July 2014)[1] played Sheyrah in the Doctor Who story The Crusade and the uncredited role as an Attendant to Ping-Cho in Marco Polo.[source needed] She was the first person associated with Doctor Who to reach the age of 100.
She passed away at 102 years old from cardiac arrest with the wish to be cremated, making Olaf Pooley the longest surviving Doctor Who actor.