Dianna Agron steps out in a fun Erdem red-dotted dress as she arrives for her appearance on Late Night with Jimmy Fallon in New York City on Tuesday evening (August 2).

The 25-year-old Glee starlet, who completed her look with Camilla Skovgaard heels, is on the promo trail to promote Glee 3D: The Concert Tour movie.

It was just announced earlier this week that Dianna and some of her Glee cast-mates will be participating in Fashion’s Night Out.

According to Page Six, select cast members will “act as spokespersons for the worldwide shopping initiative spearheaded by Vogue Editor in Chief Anna Wintour.”

During Fashion’s Night Out, participating stores offer special products, discounts and extend normal shopping hours. This also marks the first time that e-commerce sites, including Net-a-Porter, Shopbop and others, will also participate.

10+ pics inside…