Grealish told Everton's website: "There is a reason for [choosing number 18]. There were other numbers but my two favourite English players ever are Wayne Rooney and Paul Gascoigne and I know they both wore number 18 here.
"So, as soon as I knew this deal was close, I had a look and number 18 was free, so that was perfect for me and it was the only number I was going to take from that point. I spoke to Wayne [Rooney] before I came here and I mentioned that to him - about the number 18 - so I hope he's happy as well!"