Chris Pratt and Anna Faris got back together Wednesday … not in a romantic way, but to celebrate their son, Jack!

The two megastars attended Jack’s promotion from sixth grade at a park in Santa Monica … and, it seemed like a fun recreation activity for the former husband and wife paying.

Check out the pics … CP and AF are smiling while posing on the sides of Jack — keeping the reason to stay amicable in between them.

They even embraced at one point … proving they’re doing their best to keep any animosity regarding their split behind closed doors.

As you know … Anna and Chris announced their separation in 2017 after nearly a decade together, finalizing the divorce the following year.

The two have since moved on … with Anna marrying cinematographer Michael Barrett in 2021 — while Pratt married author Katherine Schwarzenegger in 2019. Pratt and Schwarzenegger were pictured chatting with Faris and leaving the event together.

BTW … Jack was born nine weeks premature and weighed just three pounds when he was born in 2012 — and, both Faris and Pratt have talked publicly about his uncertain health early on in his life.