People aged 32 and above can book their vaccine from today, the NHS has confirmed.
Health Secretary Matt Hancock tweeted that the rollout is 'going gangbusters' as the vaccines programme moved into the younger age group on Saturday.
NHS England is rolling out the first dose of the vaccine to the next age groups, just after announcing those 34 and over could get one.
Officials had earlier said 32-year-olds could expect to get texts inviting them to book on Monday, but the opportunity has arrived even earlier in a weekend jabs boost.
The health service's vaccines bookings website updated on Saturday to extend the jabs appointments to 32-year-olds, with anyone set to turn 32 before July 1 eligible to book a slot.
With the government looking on track to hit its goal of having all adults vaccinated by July, one million more people in their thirties will be able to book themselves in for a first shot via the NHS website from 7am.
This comes as NHS England is set to have delivered more than 50 million doses by today, with more than 40% of adults having had both jabs and 70% at least one dose.
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People aged 33 will receive texts inviting them to book a vaccination from Saturday, and from Monday people aged 32 will receive a message, although eligible age groups are being encouraged to book online now.
Those aged 34 and over were on Thursday told it was their turn to reserve a slot for the jab as the rollout has been sped up to tackle the Indian variant of Covid-19.
Prince William, 38, was among them, with pictures of him rolling up his sleeve so he could get the jab, leaving fans blushing over his "guns".
Since eligibility was widened to people under 40 just over a week ago, 2.6million more bookings have already been made, the NHS has said.
Mr Hancock has said extending the rollout to 32 and 33-year-olds is "an incredible step forward in the biggest and most successful vaccination programme in NHS history" and urged people to get their jab when contacted.
Mr Hancock added: "This is truly a testament to the heroic work of our amazing NHS and care staff, volunteers and local authorities across the country who have helped deliver over 50 million jabs at lightning speed across England, keeping us on track to offer a vaccine to everyone by July.
"The vaccine has already saved thousands of lives and you are far less likely to get symptoms or be admitted to hospital if you get the jab."
NHS chief executive Sir Simon Stevens said that over half of people aged 35 to 39 have now had their first jab.
He added: "Today, the biggest NHS vaccination programme in history hits another milestone as we pass 50 million life-saving jabs delivered across England."
GP and national medical director for primary care Dr Nikki Kanani reminded people that they can take up their offer for a jab at any time.
Dr Kanani said: "It is fantastic to see so many people come forward so quickly to get their life-saving Covid vaccine - this action means that we are protecting our communities against the virus.
"The offer doesn't go away so if you are eligible and haven't booked, please do come forward and do so.
"It is safe, effective and will protect you and those around you."
On the advice of the Government and Joint Committee on Vaccination and Immunisation (JCVI), people aged 50 and over and the clinically vulnerable are also having their second doses brought forward to counter the spread of the Indian variant.
People aged 39 and under who are eligible and pregnant women will be offered the Pfizer or Moderna vaccine in line with recently updated JCVI guidance.
The NHS is urging everyone who is eligible to take up their jab at one of the 1,600 locations across the country.
Text invitations appear as an alert from 'NHSvaccine', including a web link to the NHS website to reserve an appointment.
People who cannot go online can call the service on 119 instead to book their jab.
