Katy Perry & Isla Fisher: Gatsby Opening Cocktail Party!

Katy Perry keeps it dressy while attending the Gatsby Opening Cocktail Party on Tuesday (April 30) in New York City.

The 28-year-old entertainer was seen posing with The Great Gatsby actress Isla Fisher, Mia Moretti, and Florence Welch, who has a song on the film’s soundtrack with her band Florence + The Machine.

PHOTOS: Check out the latest pics of Katy Perry

Earlier in the day, Katy was spotted hooking arms with her stylist Johnny Wujek in the Big Apple.

FYI: Katy and Isla are both wearing Prada.

10+ pictures inside of Katy Perry and Isla Fisher attending the Gatsby Opening Cocktail Party…