Large crowds are expected on the streets of Dublin and Galway today to show their support for the European Union.
The second round of the French Presidential elections are just a week away, with Marine Le Pen saying she will take her country out of the EU if she wins.
Pierre Klein, from the Irish branch of Pulse of Europe, says they want to send a clear message to the French people about the benefits of staying in.
"One of the messages of the gathering will be stay with us, rester avec nous.
"The idea is to be together, European citizens, and having a kind of positive message to the French people who are going to vote next week," he said.