Arshavin is a regular at the chain's restaurant in Hampstead, north London, where he has been taking his family on regular outings.
One stunned worker told The Sun: "None of us can believe it when we see Andrey in here with his family.
"He's a regular, so collects the £1.99 meal deal vouchers to cut down on the total when they're in. He could easily afford to eat anywhere in town.
"But he says he loves the taste of our food and recognises it's cheap for a full family."