Thai well-wishers take part in a candle-light vigil as they gather at Sanam Luang park to celebrate King Bhumibol Adulyadej's 88th birthday in Bangkok

Thai well-wishers hold portraits of King Bhumibol Adulyadej as they sing songs to celebrate his 88th birthday at the Siriraj hospital where the King has been staying for months in Bangkok

Thai well-wishers recite prayers as they gather to celebrate King Bhumibol Adulyadej's 88th birthday at the Siriraj hospital where the King has been staying for months in Bangkok

Thai children wear costumes as they stand on a stage during celebrations of King Bhumibol Adulyadej's 88th birthday at the Siriraj hospital where the King has been staying for months in Bangkok