Rebecca Llewellyn
| Country (sports) |  United Kingdom Wales  | 
|---|---|
| Residence | Welwyn, Hertfordshire, England | 
| Born | 5 October 1985 Cardiff, Wales  | 
| Height | 1.65 m (5 ft 5 in) | 
| Turned pro | September 2003 | 
| Retired | September 2007 | 
| Plays | Right-handed (two-handed backhand) | 
| Prize money | $58,304 | 
| Singles | |
| Career record | 97–108 | 
| Career titles | 1 ITF | 
| Highest ranking | No. 280 (28 August 2006) | 
| Grand Slam singles results | |
| Wimbledon | 1R (2005) | 
| Doubles | |
| Career record | 58–45 | 
| Career titles | 7 ITF | 
| Highest ranking | No. 309 (23 April 2007) | 
| Grand Slam doubles results | |
| Wimbledon | 1R (2005, 2006) | 
Rebecca Llewellyn (born 5 October 1985) is a retired tennis player from Wales.
In her career, she won one title in singles and seven in doubles on the ITF Women's Circuit. She reached career-high rankings of world No. 280 in singles and No. 309 in doubles. She has not competed professionally since 2007.