The Danny Boyle-directed opening ceremony cost 27 million pounds ($42.3 million) to produce and is expected to draw an estimated global television audience of 1 billion.
Olympic organizers confirmed late Thursday that the extravaganza has not sold out, saying that tickets are still on sale in the two highest price categories. Available tickets cost 2,012 pounds ($3,157) or 1,600 pounds ($2,510) apiece, organizers said.
Organizers would not say exactly how many tickets remain on sale, describing the quantity as "a few."
But The Guardian reported that a telephone ticket salesman told the newspaper that tickets are still available in groups of up to four.