Sir George (real name: Georgius), also known as "Old Goerge", is a major anti-hero in season 3 of Ben 10: Ultimate Alien. He is the first Forever Knight and founded them over 1,000 years ago. He is the ancient enemy of Diagon. He also wields a powerful sword named Ascalon, created by Azmuth.
He was voiced by Peter Renaday.
In The Purge, he recruited the Forever Knight leaders to join his own faction of The Forever Knights, uniting all the separate factions into a single order, and later started a war against all aliens on Earth.
In "A Knight to Remember" he would obtain Ascalon and return to his full power.
In "The Ultimate Enemy" he would battle Diagon after he freed himself from the seal, but Diagon would kill him witgh lightening.
- According to himself, Sir George was just like Ben when he was young. This is reinforced by how Sir George's personality starts to mirror Ben's after his youth is restored by Ascalon.
- The symbol on the seal that was holding the Lucubra, Diagon and on Sir George's coin also appears on Forever Knight armor. The symbol is the picture depicting the word infinity (∞), a word consistent with The Forever Knight's name.
- It was revealed in the episode "A Knight to Remember" that Sir George is the legendary Sir George from "Sir George and the Dragon", but the dragon is revealed to be Diagon.