The actors announced the news Sunday night in statements shared to their social media pages.
"We are sad to announce we are legally separating. We tried hard for a long time, and we're really disappointed," Faris shared to Instagram. "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. We still love each other and will always cherish our time together."
Pratt also shared the statement, signed by both of them, to his Facebook page, with the additional sentiment that the pair will "continue to have the deepest respect for one another."
Back in June, Faris wished the Jurassic World star happy birthday when he turned 38 with a sweet, romantic message on Twitter.
"Ahhh!!! Happy birthday honey!! You always make me laugh. And I love being romantic over twitter. @prattprattpratt," Faris wrote.
"I'm in awe," Faris said. "On the way here I was so much more nervous than Chris was… I felt like I've always known he's a brilliant actor. And now I feel like the rest of the world is getting to see that. I'm so thrilled about this movie."
"It’s nice to have your family with you because it brings you down to earth and when you leave your feet on the ground, you [realize] what it feels like to have your head in the clouds," Pratt shared.
Reflecting on how his life and mindset can become something of a whirlwind when he's on his own for a long stretch of time, Pratt said, "You go with the flow and things come and go and you’re not even there to record or observe them… So when [your family] bring you back down to earth you get to experience this -- or at least I do -- in a whole different way. When they are present with me, I get to be present with me as well."