Miles Harrison is a rugby union commentator for British television and radio networks Sky Sports, ITV, Channel 4, Prime Video and talkSPORT.

After obtaining a degree in Politics and Economic History from the University of York and a post-graduate qualification in Radio Journalism from City University London, he worked for the BBC in York and Leeds. In the early 1990s, he moved to BBC Radio Sport, commentating on rugby union, football and cricket. He was also part of the commentary team for BBC Radio's coverage of the Wimbledon tennis tournament each summer and was a regular presenter of the sports news on Today (BBC Radio 4).

In 1994, when Sky Sports secured the rights to live club rugby, Harrison was invited to be the lead commentator for their rugby union coverage. This has included seven British and Irish Lions tours, England internationals (both at home and abroad), plus Champions Cup rugby and numerous domestic club competitions.

Harrison has worked for ITV Sport on the Rugby World Cup since 2007. At the 2015 Rugby World Cup in England, Harrison combined this with working for World Feed television and radio coverage: his commentary on the Final was part of the biggest-ever television worldwide audience for rugby. He commentated for ITV Sport at the 2019 Rugby World Cup in Japan and did so again for the 2023 Rugby World Cup in France.

For the 2011 Rugby World Cup, Harrison worked for Sky Television in New Zealand as a commentator, expert and presenter.

Since 2016, Harrison has been a commentator on ITV Sport's coverage of the Six Nations Championship. Between 2018 and 2022, he led commentary for Channel 4's coverage of international and domestic rugby. From 2022, he has been part of the Prime Video team for their coverage of international rugby.

Harrison’s voice has been heard on every Champions Cup final since the competition began; notably for Sky Sports, Channel 4 and ITV Sport.

Since 2022, he has been the lead commentator for ITV Sport’s coverage of Premiership Rugby in England and the Champions Cup.

He has also worked for talkSPORT as a presenter, fronting the radio station's coverage of the 1999 Rugby World Cup and 2003 Rugby World Cup, and as a commentator for international rugby.

Harrison was named the 2007 Guinness Rugby Union Journalist of the Season. In 1997, he commentated on Sky's BAFTA award-winning rugby union coverage; he was also the commentator on ITV Sport's BAFTA-nominated rugby union coverage in 2007 and 2017.

Harrison provided the commentary for HB Studios Rugby World Cup 2011 (video game) and subsequent productions, having previously voiced other video games.

In print, Harrison has written two books for Aurum Press: Best Seat in the House – the story of the 1997 British Lions tour to South Africa and Grand Slam – a history of the Five Nations Championship. He has also ghosted the autobiography of Welsh rugby legend JPR Williams Given the Breaks.