It was incredibly shocking to the world, as the pair seemed incredibly strong.
However, since the break-up, Anna has been opening up about the problems in their relationship that eventually led to its breakdown.
Of course, the internet's first reaction was to blame Jennifer Lawrence, Chris' Passengers co-star.
Anna has now written in her new book Unqualified that she felt “insecure” about the whole situation of them working so closely together. (Unqualified was written before the breakup.)
“Before [Jennifer and Chris] met in person, my publicist pulled me aside,” she wrote. “'Anna, listen there are going to be paparazzi all over them,' she said. 'There are going to be shots of them laughing together on their way to set. There are going to be stories circulating, and you have to brace yourself for this.'
“I didn’t think it would bother me. I’ve been in this business a while now and I had seen Chris star alongside other beautiful women,” she added.
“I’d always taken pride in our relationship, and the coverage, even though it was just false rumours, was making me feel insecure.”
However it's important to note that Anna placed no blame on J.Law at all.
“Jennifer and I really are friendly, and she was apologetic even though she didn’t need to be because she hadn’t done anything wrong,” Anna writes.
Ah, Hollywood... amiright?