George Clooney doesn't need your Target gift card for diapers and strollers, because he and Tequila partner Rande Gerber just scored a billion bucks by selling their Casamigos brand.
The buyer -- Diageo, a British alcohol beverage company.
George and Rande agreed to stay with the company, which means they'll rake in even more.
The 2 bros, along with Michael Meldman, created the brand just 4 years ago ... so their return is spectacular.
Rande tells TMZ he's shocked at how much money they made, saying, "We never could have imagined it."
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