Andrew Charles Tillman (born 1952) is one of the founders of the llama industry in the United States. He is an expert on llama and alpaca health, selective breeding, and marketing. Tillman is the co-founder of the International Llama Association, and he wrote the halter-class guidelines for the American Llama Show Association. His book, Speechless Brothers, was the first comprehensive study of llama husbandry published in the United States.