Pooradam Thirunal Sethu Lakshmi Bayi CI (1895–1985) was the regent of the Kingdom of Travancore in southern India between 1924 and 1931. She, along with her younger cousin, Moolam Thirunal Sethu Parvathi Bayi, were adopted into the Travancore Royal Family and were the granddaughters of the celebrated painter, Raja Ravi Varma.