Lakhon nai (, ) is a Thai performing art originating in the royal court of Thailand (formerly Siam). It features slow choreography accompanied by a piphat ensemble. The repertoire of lakhon nai consists of only four epics; the Ramakian, Unarut (Aniruddha), Inao (Panji), and Dalang (a greater version of Inao). A variation of this genre with male performers is called lakhon nai phu chai (; ).
Lakhon nai is believed to be a contraction of lakhon nang nai (à ¸¥à ¸°à ¸Âà ¸£à ¸Âà ¸²à ¸Âà ¹Âà ¸Â), or 'theatre of the women of the palace'. It was also known as lakhon khang nai (à ¸¥à ¸°à ¸Âà ¸£à ¸Âà ¹Âà ¸²à ¸Âà ¹Âà ¸Â, literally, 'theatre of the inner court') and lakhon nai phra ratchathan (à ¸¥à ¸°à ¸Âà ¸£à ¹Âà ¸Âà ¸Âà ¸£à ¸°à ¸£à ¸²à ¸Âà ¸Âà ¸²à ¸Â, literally, 'theatre of [belonging to] the king').