The council said the concert at Custom House Square was a non-ticketed event and entry would be on a first come, first served basis with gates opening at 12:00 GMT.

BBC: Belfast to host four days of St Patrick celebrations

The event, which is celebrating its 20th anniversary, began at Custom House Square at noon before winding its way through the city.

BBC: Thousands at Belfast Gay Pride parade

One of the most remarkable examples of the custom was found at an isolated country house in Tasmania.

BBC: News, Sydney

Former X Factor singer Amelia Lily is headlining a free concert at Custom House Square on Sunday 17 March, with a parade also taking place in the city centre.

BBC: Belfast to host four days of St Patrick celebrations