Reese Witherspoon in Zac Posen

Out for the premiere of new movie "How Do You Know" Reese Witherspoon looked gorgoeus in her deep purple Zac Posen dress which she paired with black suede YSL pumps.

Reese's dress is from the Spring 2011 so isn't available yet, but you can get a similar look with Elise Ryan's £29.00 Bow Front Dress - it's not totally similar but does have the sweetheart neckline and detachable straps for Reese's shoulder-showing look.

Pics from Zimbio