The Dux and Duchess shared today with fans a photo of little Archie.
Father’s Day is celebrated on the third Sunday of June in many countries.
The photo of the baby is on the royal couple’s Instagram.
“We wish the Dux of Sussex a Happy Father’s Day,” this is written next to the photo.
In the photo, Prince Harry is gently hugging the child, while Archie is looking straight at the camera.