More than 50,000 people attended the annual St Patrick's Day Parade in London.
Double Olympic gold medal winner, Kellie Harrington, and Irish Paralympic gold medal winning cyclist, Katie-George Dunlevy, were this year's grand marshals.
London Mayor Sadiq Khan said the St Patrick's Day Parade is a highlight of the city’s cultural calendar.
Speaking this morning, Mr Khan also said that the St Patrick's Day parade is a celebration of Ireland's contribution to the city.
"When I look at any part of London life, whether it's the National Health Service, whether it's arts and the creative industries, whether it's the business community, whether it's entrepreneurship, whether it's construction industry - you can see the Irish footprint and fingerprints there.
"And actually, you know, after the Second World War, it was the Irish community that helped to rebuild our city.
"But even today, we have third, fourth, fifth, sixth generation Londoners of Irish background that I'm keen to get across to them. You can be really proud to be a Londoner. But also be really proud to be Irish as well," Mr Khan said.
Minister for Children Norma Foley, who was representing the Government, said that the scale of the event represented a phenomenal mark of respect to Irish people.
"I think there's no other country in the world that can look at such warmth and such hospitality and such open doors, if you like, across all political divides. So it's quite remarkable," she said.
Trafalgar Square was the centre of the parade which also took in Hyde Park, Piccadilly and Whitehall.
A "Peace Heroines" exhibition was part of this year's event, which saw a series of portraits on display celebrating the role of women in the Good Friday Agreement.
Ireland's Ambassador to Britain Martin Frazer praised the "fantastic" programme of events devised by the London Irish Centre.
"The parade and Trafalgar Square show is consistently a highlight in London's cultural calendar and one which we are so proud to be part of, made all the more special this year by the presence of our Olympic medalists Grand Marshals, para-cyclist Katie-George Dunlevy and boxer Kellie Harrington", he said.
Speaking ahead of the parade, Ms Harrington said she was "honoured" to be this year's grand marshal, along with her "good friend" Ms Dunlevy.
"I have always gone to the St Patrick's Day Parade in Ireland on Dublin's O'Connell Street, this be my first Parade away from home and I am very excited to celebrate it with everyone in London," the Olympic gold medalist added.
