French Gaullist politician Dupont-Aignan, who announced his support for Le Pen Friday, spoke first to the enthusiastic audience.
France votes for a new president on Sunday in a ballot being watched closely by financial markets and France's neighbours as a test of the global populist wave.
Le Pen immediately slammed Macron as the "candidate of continuity" rather than the outsider he positions himself to be.
With less than a week to go, Le Pen, 48, and Macron, 39, are hammering home their arguments to voters as the two finalists in France's tumultuous 2017 election campaign. But many voters are still undecided, meaning Le Pen, who's divided the country with her anti-immigration stance, still has a chance.
"I want France to get its independence back by negotiating with Brussels the return of our sovereignty", she said.
However, on Sunday she renewed her attacks against the single currency, which she said was "dead", - renewing a key theme of her campaign which has been marked by her anti-European Union, "Frexit" stance.
A committed European, Macron is quoted by the BBC as warning that the EU must reform to avoid the prospect of France following in the UK's footsteps out of the bloc.
Seeking to remind voters of the National Front's dark past, Mr Macron paid homage to a Moroccan man thrown to his death in the Seine River on the sidelines of a far-right march more than two decades ago.
Aadhaar mandatory to avoid fake PAN cards: Govt tells SC
The Centre pushed for mandatory Aadhaar cards, saying that it was a more robust and foolproof method than PAN cards, which can be faked.
The latest Harris Interactive poll, which correctly predicted the result of the first round, revealed a six points slip by Mr Macron since last Sunday to 61 per cent with now Ms Le Pen on 33 per cent. Far-right candidate Marine Le Pen says her new campaign ally, Nicolas Dupont-Aignan, would be her prime minister if she is elected.
In Paris, Le Pen's 88-year-old father Jean-Marie - whom she kicked out of the FN in 2015 - led a march from a gilded statue of Joan of Arc, the FN's nationalist icon, to Paris' Opera Garnier.
Speaking in Paris after attending a memorial for Brahim Bouarram, who was killed by extreme-right militants in 1995, Macron said he would respond to Melenchon at a rally starting at 5 p.m.
Referring to her plan to hold a referendum on whether France should remain in the European Union, she said: "The French people will decide".
The founder of the far-right National Front, Jean-Marie Le Pen, has called on the French to vote for his daughter Marine Le Pen in Sunday's presidential runoff. She took the opportunity to slam globalist candidate Emmanuel Macron as the continuation of the government of President François Hollande, the most unpopular French leader in modern history.
Macron on Monday is joining Bourram's son and anti-National Front protesters to honor Bourram's memory.
Meanwhile, the traditional May 1 union marches across France celebrating workers' rights will be politically charged this year. "Globalization is not only the face of those who oppress". "For example, the European Alliance, which would allow countries to unite in projects not contradicting their national interests, because the main problem of the European Union is exactly that it has become nearly totalitarian", Le Pen said in an interview with the Europe 1 radio station.