Aimée Delamain
From Tardis Wiki, the free Doctor Who reference
Aimée Delamain (21 April 1906-18 June 1999[1]) played Doña Arana in the Doctor Who television story The Two Doctors.
She had known director Peter Moffatt since 1945, when they were both members of the same repertory company. (DCOM: The Two Doctors)
She was the oldest actor to have appeared in Doctor Who at the time of her death.