Ruby Miller (born August 1992) is a Welsh racing cyclist from Llantwit Major.

She began competing as a triathlete at the age of 10 as her mother was a coach with the Maindy Triathlon club in Cardiff.

[2][3] She raced in the Netherlands in 2007, representing Wales in the Interland track competition.

[3][4] During the 2008-2009 Track Cycling season Ruby competed in the Revolution Future Stars Series at the Manchester Velodrome.

She took a number of impressive race victories throughout the season and won the series overall in February 2009, defeating Laura Trott.