They Do! Celebrity Bridesmaids

They're usually the center of attention, but these stars are happy to play second fiddle when it comes to their best friends' weddings

KEIRA KNIGHTLEY

Her brother's April 2011 nuptials in Scotland marked the first time that Keira Knightley served as a bridesmaid – though she graded her performance as "bad. I don't know what happened. Every drink I had went straight down the front [of the dress] and then the food went straight down the front!" she lamented.