Sir Roderic Victor "Roddy" Llewellyn, 5th Baronet, born (1947-10-09) October 9, 1947 , is a British baronet and gardening expert. Despite his lengthy career as a landscape gardener, gardening journalist, author, and television presenter, he is probably best known for his eight-year relationship with Princess Margaret, Countess of Snowdon, the younger sister of Queen Elizabeth II.