It's a sad time if you're a fan of celeb couples -- two (cute) pairs just called it quits.
Us Weekly reports that "Oz: The Great and Powerful" star Michelle Williams and her "How I Met Your Mother" boyfriend Jason Segel have ended things after about a year.
Sources say that distance came between them, with Michelle living in New York with daughter Matilda, and Jason spending most of his time in Los Angeles shooting his sitcom.
Williams had just opened up about their relationship in the March issue of In Style, joking about Segel's height and expressing her joy over the positive public reaction they've gotten.
“If people are happy about it that makes me feel good because in my head the opposite is often true — that people fault or blame you for things,” she shares. “That’s really painful. You wish they would just want you to be happy, for your kid to be happy, and for you to have a good life and do good work."
Us Weekly also reports that Rachel McAdams and Michael Sheen have split after more than two years together.
The couple met on set while shooting Woody Allen's "Midnight in Paris" in July of 2010, and went public with their relationship in October of that year.
This wasn't the first time McAdams hooked up with a costar -- she famously dated Ryan Gosling for two years after working with him on "The Notebook."
Click "Launch Gallery" above to see other shocking celeb splits over the years.