Insiders say that Chris Pratt and Anna Faris are not going their separate ways because someone cheated.  Jennifer Lawrence wasn't the cause either. Instead, they apparently split up because they each have very different views of what a family should be.

Sources tell us Anna wants a more traditional family set-up and more kids. Lots more kids. Chris, on the other hand, has had some life-changing experiences that has required him to adjust the balance between family and career. When he married Anna back in 2009, she was a much bigger star than him. Now, HE is at the top of the Hollywood food chain, and with that comes opportunities that take him all over the world, shooting movies that take him away from home for months at a time. He allegedly doesn't want more kids in the foreseeable future, because he can't juggle a growing family with his career. He also can't be kept in one place, because that's not the way the movie industry works. 

The two stars are devoted parents to their son, Jack, and they are determined to keep it that way. The sources say there are other personal reasons for the split, but their long-term family plans are a big factor in their decision.

Source: TMZ