Following his international retirement, a move to Everton and, just last month, a switch across the Atlantic to DC United, he has now joined the scores of passionate supporters and sent his well wishes to the squad in Russia.
"They are doing fantastic. Hopefully we can get the win," Rooney, speaking at the ribbon-cutting ceremony for DC United's new Audi Field stadium, said of England's game against Croatia.
"It's great. You see the atmosphere back home. There are billions watching it. Hopefully we can get through and go on to the final.
"For the players and Gareth, I wish them massive good luck. They are making us all proud.
"Hopefully they can get that one step further and get to the final and bring the Cup home.
"I've enjoyed all the buzz coming out of this. We're enjoying it and we believe."