Advanced voting is usually a tepid affair, but on Sunday excitement was high as voters turned up in droves to polling stations.
More than 2.3 million Thais are expected to vote before the official March 24 poll date.
In Dusit district -- home to military offices and government buildings -- voters crowded in a school yard before a polling station there opened.
People dressed in their work clothes -- military uniforms, hospital scrubs and more casual attire -- waited patiently to cast their ballot, aided by student helpers.
Watched by Thai and international media, the 98-year-old was pushed in a wheelchair into a classroom boasting a portrait of the late King Bhumibol, who he advised, before walking the final steps to a polling booth.
More than 51 million Thais are eligible to vote in the official March 24 election, which will be held under a new military-scripted constitution.
But voters on Sunday still held on to hopes for change.
"I vote today in the hope for better change," said Mart Bupa, 53.
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