Since 14 August 2014, the twenty-nine year-old versatile defender has represented the south London club 125 times - almost exactly double the number of appearances he made for his boyhood club Liverpool (62).
Back in February 2019, Kelly signed a contract extension that will keep him at the club until June 2021, saying at the time: "It's always been exciting being at Palace and I've loved the challenge of trying to stay in such a good league and really enjoyed my time here.
"As a centre-half, the experience is coming now. I've been given chance over the past couple of seasons to play there and I feel like each game I'm learning. Watching in the first couple of seasons the people in front of me, I've learnt a lot from them. When the chance has come for me, I've enjoyed playing with some top class defenders."
Watch this video below to see Kelly's watch his initial signing interview on this day in 2014, and reflect on his time in red and blue.