JOHN CUSACK PAYS BACK PAL --- AND THEN SOME!

PAYBACK'S A BITCH!

Visiting his hometown Chicago, "America's Sweethearts" star John Cusack phoned an old actor buddy who'd done him a favor when he was breaking into The Biz -- and invited him to dinner at a posh eatery. John's jaw dropped when Windy City Pal showed up with his wife and two kids, his brother and ANOTHER COUPLE -- none of whom the star had ever even met! John's tab? Nearly six hundred BIG ONE$$!