The couple, who met in 2007 while filming the romantic comedy Take Me Home Tonight, said attempts to save their relationship had failed.
"We tried hard for a long time, and we're really disappointed," Pratt wrote in a post on Facebook.
"Our son has two parents who love him very much and for his sake we want to keep this situation as private as possible moving forward," the statement said.
The statement added that the two had "cherished" their time together and "continue to have the deepest respect for one another".
And now Chris has spoken candidly about their split for the first time, admitting they're probably both "doing better" now.
Speaking to Entertainment Weekly, the father-of-two said: "Divorce sucks. But at the end of the day, we've got a great kid who's got two parents who love him very much.
"And we're finding a way to navigate this while still remaining friends and still being kind to one another. It's not ideal, but yeah, I think both of us are actually probably doing better."
It's the first time the actor has spoken so openly about the couple's split.
Anna, meanwhile, spoke to Dax Shepherd on his , about how it felt to see everyone's comments online.
“Chris and I did talk about [it]. We got, like on the Twitter feed, yes like ‘Love is dead’ and ‘relationship goals'."
“I think what we were also guilty of — although we had an unbelievable marriage and we have a great friendship now, we love our son to death, and I’m really proud of that because I’m not sure I did that well the first time [I was married]. But I do think we obviously cultivated something, and it was rewarding for a while. It was like ‘Oh, people seem to think we got all this shit all right.’”
When asked whether she felt pressured about 'letting down' their fans, she explained: "I don’t know if embarrassment is quite the right word. Something akin to that. I had a little bit of a childish feeling of ‘Oh come on, fucking grow up!’ Like, a little anger. But that’s not fair either because I cultivated it though,"
“We intentionally cultivated this idea of like, ‘Look at this beautiful family.’ There were so many moments that were like that but of course just like anything on social media, you don’t post like, ‘Where the fuck is the toilet paper?!’ or whatever. I think it’s a very hard forum to be genuine, and I think it does a disservice to people to not be."
She also spoke about marriage in general and its role in society.
She said: "I need to figure out what the purpose is. Is it safety for your children? Is it convention? Is it so other people respect your relationship more? For me, I’m just not quite sure where it fits, especially when it feels so easy to get married, and then there’s like the untangling in terms of the state getting involved.”
“There is the importance of how other people then treat you as a married man as opposed to a man with a girlfriend. I do think it is important how other people respect a relationship—I’m not saying it’s a good reason, but it is a small benefit of having that label of being married.”
Anna's now dating cinematographer Michael Barrett, but it seems that marriage may not be on the cards, given her latest revelation. Either way, Anna and Chris are still friends and their little boy will have a life full of love.