How do you shake up a so-so summer movie promotional tour?
Show some skin, natch.
That's what sexy star Olivia Wilde decided to do at the Cowboys & Aliens premiere in London yesterday...
The 27-year-old actress busted out a whole lot of side boob when she went braless in a sheer, long-sleeve Gucci polka-dot gown with contrasting pussy bow, Brian Atwood pumps, bright red lips and nails and Bump-It-esque hair.
Of course Olivia had to show some skin in this otherwise prim, prairie-style dress, but is it too much side cleavage?
Check out the close-up snap and then weigh in below!