A military parade is under way at Collins Barracks to mark the 90th anniversary of the Reserve Defence Forces.
Among those in attendance are current and past members.
It was first established in 1929 when the 1st City of Dublin Volunteer Battalion began recruiting in the capital.
Since then over 200,000 reservists have served.
Speaking at the event, Minister for Defence Paul Kehoe said the Reserve Defence Forces has a long and proud history and holds a special place in the hearts of many people around the country.
The Minister also launched a new information booklet for employers, highlighting the benefits of employing someone from the reserves.
It says reservists bring skills such as leadership and discipline to their jobs.
