The Brooklyn-based couple had maintained a low profile throughout their relationship. They were first photographed holding hands after last year's Met Costume Institute Gala, but had seldom been seen in public.
This marks the second big breakup for Williams in the past 18 months. In February of 2013, she and Jason Segal ended their year-long romance, citing the strain of dating long-distance. She also previously dated director Spike Jonze and has an 8-year-old daughter, Matilda, with late former fiancé Heath Ledger.
In our imaginations, Williams is about to have a summer of glorious al fresco dining, weekend jaunts out of town, and whatever her heart desires. That'll be just what the (love) doctor ordered. (Us Weekly)
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