Various football clubs, players and others within the game, including journalists and pundits, have paid tribute to Speed on Twitter.
Take a look at the tweets below:
"Two years on and it's still so shocking. RIP Gary Speed."
Arsenal and Wales midfielder Aaron Ramsey
"Lots of moving tributes to a true Welsh gentleman on this sad anniversary. #GarySpeed Cofio am Byth | Never Forgotten."
The Football Association of Wales
"Two years on. Always in our hearts. Gary Speed (8th September 1969 - 27th November 2011)."
"2 years today, RIP Gary speed never be forgotten.."
Liverpool and Wales winger Harry Wilson
"Gary Speed's death still so shocking and raw two years on. #RIPSpeedo."
Sky Sports presenter David Jones
"RIP gary speed, thoughts with his friends and family. never forgotten."
Liverpool and Wales goalkeeper Danny Ward
"2 years ago today a good pal tragically died, I still can't get my head round why it happened??RIP Gary Speed."
Sky Sports presenter Chris Kamara
Two years ago today, the football world lost a true great. RIP Gary Speed. pic.twitter.com/0khs2nqmti— Everton (@Everton) November 27, 2013