Garry Peter Lyon (born 13 September 1967) is a former professional Australian rules football player and was captain of the Melbourne Football Club in the Australian Football League (AFL). Since his retirement from football, he has been mainly an Australian rules football media personality, featuring on television, radio and in newspapers. He has also coached during the International Rules Series. He is the most recent VFL/AFL player to kick ten goals in a finals match, having done so in the 1994 Second Semi-Final against Footscray, and the first since Geelong's George Goninon in 1951, 43 years prior.

Lyon, the son of former Hawthorn player Peter Lyon, was born in Devonport, Tasmania. In his youth he moved to Victoria.

Lyon's radio career began in the late 1990s on 3AW, and in 2004 he hosted Morning Glory on SEN 1116. In 2005, he returned to 3AW, and he appeared on Sports Today as well as providing special comments for the station's AFL coverage. In 2007, Lyon moved to Triple M where he provided special comments on Friday Night and Saturday afternoon matches until the end of 2015.

Lyon became a regular panelist on The AFL Footy Show late in his playing career. In 2006, alongside James Brayshaw, he took the hosting reins of the program after Eddie McGuire became CEO of the Nine Network. Previously he had worked alongside Brayshaw on The Sunday Footy Show and in 2005 on Any Given Sunday, as well as being a presenter of the Melbourne Commonwealth Games 2006 coverage on Nine. In 2007 he became a panelist on the program Footy Classified.

Lyon is a columnist for The Age newspaper and has co-authored children's books, including those in the Specky Magee series with Felice Arena.

Gary is also the host of the T.V program on Foxtel, The couch

In 2017, Lyon returned to SEN to co-host its breakfast program with Tim Watson. Later that year, Lyon ended his long association with the Nine Network to join Fox Footy as a commentator and panelist on On The Couch. In 2022, Lyon commenced hosting On The Couch in addition to Friday Night Football for the station.

Following the Melbourne premiership win, Lyon had the honour of presenting the 2021 AFL premiership cup to captain Max Gawn and coach Simon Goodwin in Perth following the Demons winning their first flag in 57 years.

On a personal and controversial level, Gary Lyon infamously had an affair in 2013 with his colleague and friend Billy Brownless wife Nicki. "Billy" and Nicki Brownless were married for 18 years,and had four children. Gary was a good friend and colleague for several years of Billy.

Gary and Bill didn't talk for years, yet are now back on talking terms.

Gary and Nicki originally denied the affair, yet it eventually came out to be true.

(Source) https://www.9news.com.au/national/melissa-lyon-opens-up-about-garry-lyon-affair-with-brownless-wife/7d61e357-d19c-441a-bf29-3fc8c6922659

Since his retirement, Lyon has dabbled in coaching. He has coached the Australian international rules football team, debuting in 2001, and he remained coach for four successive seasons before being replaced by Kevin Sheedy. His International rules record is two wins from four series.

While many thought he might be a future coach of the Melbourne Football Club, Lyon chose not to pursue this path. In 2009, he coached the Victorian under-16 representative side at the AFL championships.^[11]

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Australian cricketer Nathan Lyon is nicknamed "Garry", after Garry Lyon.