The Most Illustrious Order of the Royal House of Chakri (Thai: เครื่องขัตติยราชอิสริยาภรณ์อันมีเกียรติคุณรุ่งเรืองยิ่งมหาจักรีบรมราชวงศ์; RTGS: Khrueang Khattiyaratcha-itsariyaphon An Mi Kiattikhun Rung-rueang Ying Maha Chakkri Borommaratchawong) was founded in 1882 by King Chulalongkorn (Rama V) of the Kingdom of Siam (now Thailand) to commemorate the Bangkok Centennial.

The order is awarded to members of the House of Chakri (the Thai royal family), foreign heads of state and members of other royal houses.

The Sovereign Grand Master of the order is Knight but the Star and Pendant have been decorated by diamonds and was called Maha Savamissaradhibodi.

(Thai: มหาสวามิศราธิบดี) The Queen Consort of the Order is Dame but the Star have been decorated by diamonds and was called Maha Savamini.

(Thai: มหาสวามินี) The decoration consists of a single class (knight).