Mark Wahlberg
The actor hopped behind the bar at EHP Resort & Marina in East Hampton ahead of Chef of the Hamptons June 22.
Jason Sudeikis
What are you having? The actor gets behind the bar at SXSW.
Mary Kate & Ashley Olsen
Make it a double! The twins tend bar during Fashion's Night Out.
Tom Hanks
Life is like a box of chocolates...which means it's obviously better with a glass of champagne. Just ask the Forrest Gump star!
Bethenny Frankel
This Real Housewives star can mix a really good drink! The Skinnygirl Cocktails founder pours some of her signature low-cal vodka.
Rihanna
The "Pour It Up" singer decided to do just that, bartending at an after-party while on tour.
George Clooney & Rande Gerber
The Ocean's Eleven actor shares a brand of tequila with his business buddy. A margarita never looked—er, sounded—so good.
Chelsea Handler & Jimmy Fallon
The talk show hosts had a bartending face-off on The Tonight Show! Tune in, turn up, drop out.
Whitney Port
Well before her pregnancy announcement (congrats!), this Hills star and USC alumnae took a lesson in mixology.
Lil Jon
The rapper served as bartender at the 2014 iHeartRadio Music Awards. "Turn Down for What?"
Kate Middleton
The Duchess of Cambridge looked like she was having a royally great time, pouring herself a pint at the bar.
Jeremy Piven
While the actor played a movie agent on Entourage, it looks like he decided to take on a new role: bartending!
Amy Adams
The Arrival star was so over-the-moon after her nomination for American Hustle at the 2014 SAG Awards, she just had to have a celebratory drink!
Drake
The "Champagne Papi" lives up to his name, pouring out drinks at a private event.
Fergie
The cocktail this Black Eyed Peas singer served up looks absolutely "Fergalicious."
Danny Devito
The It's Always Sunny in Philadelphia actor doesn't just run a pub on the show. It turns out he knows a thing or two about bartending in real life!
Oprah Winfrey
It looks like we share at least one of Oprah's favorite things—margaritas!
Giuliana Rancic
From E! News host to bartender, is there anything she can't do?
DJ Khaled
Getting served drinks by the hit-making producer? Major key—especially if those drinks were "For Free."
Gillian Anderson
We've heard this X-Files star makes an out of this world cosmo—or should we say cosmos?
Tom Sandoval
The Vanderpump Rules star is known for stirring up some drama, but it looks like he's an expert at stirring cocktails, too!
Ludacris
In addition to his music career, the rapper has his own brand of cognac—quite the "Money Maker!"