The "Lego Movie 2" star posted a short but emotional tribute to Lulu, the dog the exes shared while they were married.
"I miss you everyday," he wrote along with a puppy pic of their pooch.
The five-year-old dog died in December after a battle with cancer and the newly-divorced stars took her death hard. Calling her the "best dog," Channing wrote at the time, "I’ll see you again baby girl. But you’ll always be with me."