If there’s an award for sweetest 5-year-old on the planet, it should go to Jennifer Garner and Ben Affleck’s son, Samuel!
Garner took to Instagram on Monday to share a photo of an adorable handwritten message that the young boy left in a library book.
The heartwarming note read, “Hello, you are loved. I believe in you,” and had a small black heart drawn onto the bottom. The discovery was made by a librarian, who informed Garner of the sweet gesture.
“When the librarian finds a love note your son tucked into a picture book...♥️♥️♥️♥️. #actsofkindness #spreadlove #belikemlkjr #lovenote,” the proud mom captioned the pic.
When she's not busy with her kids -- she's also mom to daughters Violet, 12, and Seraphina, 9 -- Garner has her pets to keep her busy, frequently sharing the fun on Instagram.
In December, the 45-year-old actress shared a video showing her reading to her pet chicken, Regina George. Then on Saturday, she baked with her golden retriever, Birdie.
Watch Garner talk to ET about spending holidays with Affleck and their kids in the video below.
WATCH: Jennifer Garner Adorably Bakes English Muffins For Pretend Cooking Show
MORE: Jennifer Garner Shares Bloody Transformation for Upcoming Movie
WATCH: Ben Affleck Rides His Motorcycle Hands-Free, Embraces His Inner Batman