Diane Larsen-Freeman (born 1946) is an American linguist. She is now a Professor Emerita in Education and in Linguistics at the University of Michigan in Ann Arbor, Michigan. She works in Applied linguistics. She studies in second language acquisition, English as a second or foreign language, language teaching methods, teacher education, and English grammar. Her work on the complex/dynamic systems approach to second language development is very important and well-known.