No one has come forward to claim a lottery win of nearly £64 million, making it the UK's biggest ever unclaimed prize.
The money will now go towards good causes.
Somebody bought the winning ticket in or around Stevenage and Hitchin in Hertfordshire.
But as the deadline for claiming the win got closer no one had come forward, sparking a big search in the area for the missing ticket.
A National Lottery spokeswoman said: "Unfortunately, I can confirm that the ticket-holder did not come forward within the deadline to claim their prize and has now sadly missed out on this staggering amount of money."