PARIS — Two men will become the first gay couple to wed in France, just days after President Francois Hollande signed the same-sex marriage bill into law.
Vincent Austin and Bruno Boileau will tie the knot in the southern city of Montpellier amid tight security.
Hollande has warned he will not accept any disruption to the ceremony.
The new legislation has proved controversial and sparked violent protests.
The anti-gay marriage lobby, backed by the Catholic Church and conservative opposition, argues the bill undermines an essential building block of society.
The Socialist mayor of Montpellier was due to pronounce the couple “husband and husband” late today.
Austin, a 40-year-old gay rights activist, met his 30-year-old partner in 2006.
Some 600 guests have been invited and 150 media crews accredited for the ceremony, the BBC’s Christian Fraser, in Paris, reports.
Extra police have been drafted in, as the extreme-right might also be in attendance, our correspondent adds.
On Sunday, at least 150,000 demonstrators took to the streets of Paris to denounce the same-sex marriage bill, which was signed into law on 18 May.
Earlier, the Constitutional Council ruled that same-sex marriage “did not run contrary to any constitutional principles”, and that it did not infringe on “basic rights or liberties or national sovereignty”.
Hollande and his governing Socialist Party have made the legislation their flagship social reform since being elected a year ago.
Opinion polls have suggested that about 55-60 per cent of French people support gay marriage, but only about 50 per cent approve of gay adoption.
France is now the 14th country to legalise gay marriage after New Zealand last month. (BBC)