The vaccine registration portal will open for people aged between 60 and 64 by the end of this month.
This morning the portal went live for people aged 69.
By lunchtime today, over 18,000 people had signed up for the jab.
Only those aged 69 are able to register today, but 68-year-olds will be able to do so tomorrow, followed by 67-year-olds on Saturday, and so on.
HSE boss Paul Reid says this will be expanded for everyone in their sixties in the next few weeks.
The HSE says it will be assigning appointments by age and everyone in this cohort will be getting the AstraZenenca vaccine.
The latest figures show 1,094,964 covid-19 vaccine doses have been administered here.
