People aged 37 will receive text messages inviting them for a coronavirus vaccine from today, NHS England said.
Along with 36-year-olds who will receive invites from tomorrow, it means more than a million more people will be made eligible.
NHS national medical director Professor Stephen Powis said: “Bookings for the fastest and most successful NHS vaccination programme in history continue to surge with more than 930,000 appointments made in a matter of days since opening up to 38 and 39 year olds.
“With well over 30 million first doses of vital protection against coronavirus delivered just six months into the NHS vaccination drive, the NHS is able to open up to 36 and 37 year olds as the programme continues at pace.
“On the advice of the Government and JCVI people aged 50 and over and the clinically vulnerable are having their second doses brought forward to counter the spread of the Indian variant.
“Nobody needs to contact the NHS. You will be told how to rebook if you need to.
“Getting vaccinated is the most important step we can take to protect ourselves, our families and our communities against Covid-19, so when it is your turn to get your first or second dose please do so.”