Sienna Miller arrived at the New York Stock Exchange to ring the opening bell on Tuesday morning.

What’s fast becoming ‘Sienna Fashion Week’ continued with the actress opting for a slightly more conservative yet still chic LBD from Stella McCartney’s Resort 2010 collection, which Stella wore a few weeks ago to the Prada Congo Benefit.

As much as I love the dress, I’m not crazy about the elasticated belt. The runway belt would have worked better for me.

The star wore her hair back as she paired her look with black Christian Louboutin pumps and a wing-shaped gold earrings.

Co-stars Channing Tatum and Rachel Nichols also took part in ringing the bell.

[nggallery id=144]

Credit: PacificCoastNews, & London Features