Last night, the cast of "Glee" had their Season 2 Premiere party -- where the cast really stepped it up in the wardrobe department to celebrate.

Lea Michele, Dianna Agron, Jayma Mays, Jenna Ushkowitz, Naya Rivera, Heather Morris, Amber Riley and newcomer Charice all hit the red carpet in some cute cocktail dresses -- while Matthew Morrison, John Stamos, Kevin McHale and Harry Shum Jr. all suited up for the event.

Jane Lynch, Mark Salling, Chris Colfer and Cory Monteith decided to keep it casual for the bash, which was held at Paramount Studios in Hollywood.

Check out all the red carpet and party pics!

The new season premieres Sept. 21.

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