Gallery Sláinte! Launch Gallery Whether it's the top o' the morning or a late-night party at the bar, these stars love a tall glass of Guinness ... so take a look at some of the biggest celebs drinkin' away in honor of St. Patrick's Day!
Hugh Jackman, Kevin Hart, and Ben Affleck are just a few of the A-listers sippin' the Irish beer ... Jason Momoa might've had a little too much -- cuz it's all over his face!
Conor McGregor is all smiles with his Guinness -- and we're sure the Irish UFC champ does a lot more of this when he celebrates his national holiday.
GettyEven former president Barack Obama is enjoying the liquid luck of the Irish with a glass at the pub ... as a crowd nearby is clearly digging the rare sight!
Gallery How Stars Celebrate St' Paddy's Launch Gallery Oh, and in case you wanted to see just how green some stars can get on St. Paddy's Day -- we got you covered on that front, too.
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