"90 years for anything that you would do is extraordinary, but to be here having won the Oscar at that age just seems like a hiccup in nature, possibly, something like that, but it feels great".
Ivory had meant to co-direct Call Me by Your Name with Luca Guadagnino but bowed out when the producers thought a single director would be better.
Ivory then praised the film itself for its depiction of first love.
Before Ivory, Ennio Morricone was considered the oldest victor in a competitive category.
The director said while accepting the award "whether straight or gay or somewhere in between, we've all gone through first love, I hope, mostly intact".
Chelsea manager, Conte defends his tactics during City defeat
They remain alive in this season's competition but must find a way past Barcelona at the Nou Camp next week to reach the quarter-finals.
Venezuelan gov't, opposition agree to postpone election date to May
United Nations chief Antonio Guterres would also be invited to send an observer mission to monitor "all phases of the process". They also agreed to hold presidential and legislative elections for state and local representatives on the same date.
Three charged over fatal Leicester blast
The trio allegedly started the fire at a shop on Hinckley Road in Leicester using petrol on February 25th. Five people were taken to hospital after the explosion, including one with critical injuries.
Best Actress victor Frances McDormand gave Kim a shoutout during her acceptance speech Sunday night.
He thanked his actors, and also his long-time collaborators, both of whom have died - Indian producer Ismail Merchant and German-born writer Ruth Prawer Jhabvala. The octogenarian has always been a force in Hollywood, known best for the works he made with late collaborator Ismail Merchant (their projects became a subgenre unto themselves, nicknamed "Merchant-Ivory" films).
Ivory, Merchant and Jhabvala also frequently collaborated with Bollywood superstar Shashi Kapoor.
After several films based in India, Mr Ivory moved on to adapt classic novels of British literature, including The Europeans, The Bostonian and A Room With a View.
"I wouldn't be standing up here without the inspired help I received from my life's partners, who are gone", Ivory said.