The actor gave fans a peek at one of the personal items inside his trailer while showing off abs and special effects makeup on set.
Dad duty calls! Chris Pratt inadvertently showed off a sweet note from his son Jack, 9, when snapping a shirtless selfie from set for Instagram on Monday.
"See ya at 8:00 ish," the yellow sticky note reads, signed with a heart and his name.
The brief memo was stuck on a mirror in what appears to be Pratt's on-set trailer, where he's filming Prime Video's The Terminal List. In the snapshot, Pratt shows off his abs and a faux wound on his collarbone with the cheeky caption, "Lookin' cut."
Pratt's brother-in-law, Patrick Schwarzenegger, was quick to spot the photo's neon-colored easter egg, commenting, "See yah at 8 ish jackkkooo," while countless fans also referenced the note in their reactions.
In an interview with ET at the premiere of his new action series, Pratt said that Jack "does a great job as a big brother."
"There's a big age separation... [and] he does a great job, he's so sweet with them," Pratt marveled. "And they love him so much and they miss him when he's gone."
Aside from starring in The Terminal List, Pratt is also stepping behind the camera into the role of executive producer. For more on the project, watch below.