Casual Celebrity

Today, I went to a garden center to purchase some seeds for my newly dug vegetable garden. As I was studying the various packs of vegetable seeds, I noticed a familiar and famous person just a few feet away from me. He looked at me and I looked at  him and we just continued on with our individual business. While there were several people in the store, I noticed that everyone just left he and his wife alone to do their own garden shopping. He was just treated just like any other person who came into the store. His wife paid for their purchases and he took the purchases to their car. Who was this famous well-known person? Well, I had the distinction of purchasing my garden seeds in  the same place, at the same time the Prime Minister of Ireland was purchasing his garden seeds.