Thế Lữ (June 10, 1907 – June 3, 1989; born Nguyễn Đình Lễ or Nguyễn Thứ Lễ) was a Vietnamese poet and author. He became known as one of the pioneers of the Thơ Mới Movement with several critically acclaimed and popular poems. He joined , and worked as a journalist, critic and editor for the newspapers Phong Hóa and Ngày Nay.