The year 2011 has not been great for celebrity romance. High-profile breakups were the order of the year, from Kim Kardashian and Kris Humphries to Olivia Wilde and Tao Ruspoli to Arnold Schwarzenegger and Maria Shriver.

Divorces were finalized, separations initiated, puppy-love relationships ended, on-and-off relationships did what they always do, and at least one wedding was called off.

Here are photos of some of the biggest celebrity splits of 2011.