Chris Pratt just tugged on our heartstrings!

The 36-year-old actor took to Instagram on Thursday, April 21 to share a sweet new photo of his and Anna Faris' son, Jack — and he may be the cutest little boy on the planet!

"This morning, Jack found a rainbow on the wall. I honestly couldn't figure out where it was coming from, which according to science means it's some sort of portal. [Have you ever seen the movie] Stargate? Exactly. We were careful not to get too close. I snapped this photo and it dawned on me how much Jack looks like Anna. They are both so beautiful. Sleeping in with the two of them is my greatest treasure," Chris captioned the adorable pic of the three-year-old.

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Chris and Anna, 39 — who married in July 2009 — welcomed Jack, their only child, in August 2012.

Click through the gallery below to see more of Hollywood’s cutest kids!