Marc Jacobs: Diet Coke Launch Party with Harry Louis!

Marc Jacobs and his boyfriend Harry Louis arrive at the Marc Jacobs and Diet Coke Launch Party held at the German Gymnasium Kings Cross on Monday (March 11) in London, England.

The 49-year-old fashion designer was joined by models Eliza Cummings, Lily McMenamy, and Ginta Lapina at the party celebrating 30 years of Diet Coke and his new role as creative director for the soda giant.

PHOTOS: Check out the latest pics of Marc Jacobs

In case you missed it, Marc goes shirtless in a photo booth for his Diet Coke commercial – check it out below!