Walcott completed a £20m move to the Toffees on Wednesday after passing a medical at Finch Farm and agreeing personal terms on Merseyside.
It was not only Everton, though, who were interested in the England striker, with former club Southampton said to also be keen on a deal, but Walcott has revealed Rooney ultimately made the difference when it came to his decision.
"I had numerous chats with Wayne and that was one massive factor which really tempted me to come to Everton," Walcott told evertontv.
"He told me it was a great place to play football and a club that is on the up. Those are the reasons I came here.
"This is a club with great history. The fans are brilliant, they are always passionate… and I used to find it very tough playing here
"You want to be part of something and Wayne feels Everton are really going to improve."