Gethin Rhys Williams (born 23 February 1980 in Cardiff) is a Welsh rugby union player who plays for Cardiff Blues and has won 44 caps for Wales as a full-back and winger. During the 2005-2006 season Williams was the captain of the Cardiff Blues. Due to a loss of form, he lost his Wales place and his starting place at Cardiff; Xavier Rush has since filled this role for the 2006-07 Season.

Educated at Ysgol Iolo Morganwg (the Welsh-medium primary school in Cowbridge) and Cowbridge Comprehensive School, Rhys Williams is a versatile back, who has played at wing, centre and full back for Cardiff Blues, although full-back is his preferred position. He played here when helping Cardiff win the Welsh-Scottish League title in 1999.

He represented Wales at all age levels from Under 16 to Under 21, and played in the Youth World Cup in 1999 when Wales reached the final, losing to New Zealand along with fellow Cardiff Blues player Jamie Robinson . He made his debut for the full national side in a Six Nations Championship match against Ireland in Dublin in 2000, playing at full-back.

In the early part of the 2005 Six Nations, Williams was out of the Wales side with thumb ligament damage, but came on as a substitute against France when Gareth Thomas was injured. He did well enough to earn a place in the starting lineup as a winger in the following match against Scotland, with Kevin Morgan moving to full-back. Rhys scored two tries, including an 80 metre effort following an interception. He missed the final match of the campaign against Ireland through injury.

Rhys Williams (December 31, 1897 - May 28, 1969) was a Welsh character actor in movies and television, whose career spanned several decades.

He presented a brawny appearance and often played "tough guys" of one kind or another.

He made his film debut in How Green Was My Valley (1941). This movie takes place in rural Wales with a large cast of Welsh characters, but was actually filmed in Hollywood with a cast of English, Irish, Scottish and American actors. Williams, the only genuine Welshman in the cast, was originally hired solely to coach the actors in their Welsh accents; ultimately director John Ford gave Williams a role in the film.

He is recognizable to fans of the TV series Adventures of Superman as a sadistic character in an early episode called "The Evil Three" (1952).

Williams is buried at Forest Lawn-Hollywood Hills, Los Angeles.

Rhys Williams (b. February 27, 1984, Cardiff) is a Welsh athlete, a 400 m hurdles sprinter.

On August 10, 2006, Williams won the bronze medal at the European Championships in Athletics in Gothenburg in a time of 49.12 seconds, thus just slightly missing his personal best (49.09, set at the 2006 Commonwealth Games in Melbourne, where he finished fourth). He also ran 48.3 over the 400 m (2002).

On Sunday 13, 2006, at that same event, he won a silver medal in the 4x400 m relay as the second sprinter, along with Robert Tobin, Graham Hedman and Timothy Benjamin, in a time of 3:01.63. He is the son of rugby union legend J.J. Williams.

Rhys Williams (born 14 July 1988 in Perth, Australia) is an Australian-born Welsh association footballer. He currently plays for FA Premier League side Middlesbrough F.C. and has played for the Wales national under-21 football team.

Moviegoers can be forgiven if they thought that stocky, jaunty Rhys Wiliams was a jovial Irishman, as he often played that type of character, but his role as a Welsh miner in John Ford (I)'s classic How Green Was My Valley (1941) (his film debut) was much closer to home for him, as he was born and raised in Wales. In fact, he served as a technical advisor and Welsh language consultant on the film. He began his career on the British stage, and traveled the country as a member of various Shakespearean stock companies, even joining the famed Globe Theater company for a spell. Once he began his career in Hollywood, though, he became one of the busiest supporting actors in the business. He appeared in everything from action pictures to mysteries to westerns to musicals. One of his few villainous roles was as a weaselly American reporter in Tokyo on the payroll of the Japanese government just prior to World War II in Blood on the Sun (1945). In addition to his prolific film work, he did much television over the years, appearing in everything from "Maverick" (1957) to "Mission: Impossible" (1966). He died in Santa Monica, California, in 1969, shortly before his last film, Skullduggery (1970), was released.