Best Celebrity Pictures Week of Sept. 17, 2012

It was another full week for many of our favorite stars! Blake Lively debuted her oval diamond ring after her secret wedding ceremony in Charleston, SC, to Ryan Reynolds, while Sienna Miller and Tom Sturridge took baby Marlowe to Positano, Italy, for her first vacation. Prince William and Kate Middleton wrapped up their tour after showing off their dancing skills in Tuvalu, and best pals Gwyneth Paltrow and Cameron Diaz stepped out together for a dinner party in London.

There was a lot more excitement, so check out the rest of the week's best pictures!

Source: Wenn.com and Getty