Teddy Williams (born 18 October 2000) is a Welsh professional rugby union player who plays as a lock for United Rugby Championship club Cardiff and the Wales national team.

[4] Ahead of the 2023–24 United Rugby Championship Williams signed a contract extension with Cardiff.

[6] Williams was called into the Wales national rugby union team squad for the first time in January 2023.

[8] Williams made his debut on 19 August 2023, coming off the bench against South Africa in the 2023 Rugby World Cup warm-up matches, and received a yellow card.

Williams came off the bench for Wales in an uncapped match against the Barbarians on 4 November 2023.