Autumn has officially arrived, but Jamie Chung (and her wardrobe!) is still sprung on summer.

On Wednesday, September 18, the Once Upon a Time actress stepped out for SPLASH, an exclusive spa event held at the Hyatt Regency in Century Century. Jamie looked absolutely adorable in a watercolor Parker dress ($297) with a flirty keyhole cut-out.

The 30-year-old actress upped the playfulness of her look by rocking bold blue liner, sideswept waves, and metallic strappy heels.

Three days later, Mad Men actress January Jones wore a similar version of the Parker frock to celebrate her show at the Chateau Marmont. The 35-year-old put an edgier spin on the feminine look, pairing her dress with a piecey bob, vintage heels, and a slouchy leather jacket.

While both ladies styled their looks with minimal accessories, their vibes are undoubtedly different. Whose take on the Parker dress do you like best?

Jager Weatherby is a Photo Editor at Wetpaint Entertainment and our resident expert on all things fashion, Dawson's Creek, and Ian Somerhalder. Follow her on Twitter and Google+!