King Pinklao (พระบาทสมเด็จพระปิ่นเกล้าเจ้าอยู่หัว) Chaofa Krommakhun Izaret, Prince Chudamani (September 4 1808 - January 7 1866) was a younger brother and the vice-king of King Mongkut of Siam. He was a child of King Rama II and Queen Srisuriyendra.
He took the title Phra Pinklao on their accession in 1851. King Mongkut promoted King Pinklao as the second King in his reign. Wyatt considers his appointment a device of Mongkut’s to prevent Pinklao from challenging his own position. Both before and after his elevation, Pinklao controlled his own private army. He was interested in both western and Lao culture, speaking English, drilling his troops in European fashion and singing and dancing to mor lam music.