Amanda Seyfried celebrates her birthday with a Twenties-style dress and super-sized cake

She channeled the 1920's as she attended a party in New York earlier this week.

The Mean Girls actress showed her glamorous side as she partied with other guests in her vintage style dress.

Amanda was in The Big Apple to unveil the Clé de Peau Beauté’s Spring 2012 Collection.

Speakeasy: Amanda Seyfried celebrates her birthday at The Norwood Club

Many happy returns: Amanda seemed overwhelmed by her large birthday cake

Make a wish: The Mean Girls actress blows out her candles on the huge cake

The birthday girl: Amanda poses with her extra big birthday cake