Marion Marechal-Le Pen addresses gathering of US conservatives.

Marion Marechal-Le Pen railed against Muslim invasion during a speech Thursday at a major gathering of conservatives near Washington, D.C.

"France is in the process of passing from the eldest daughter of the Catholic Church to the little niece of Islam "

The 28-year-old niece of National Front leader Marine Le Pen spoke at the CPAC event in National Harbor, Maryland, after Vice President Mike Pence. President Donald Trump's former strategist Steve Bannon once praised her as a "rising star" and she is considered to be more hardline than her aunt on immigration and Islam.

In her remarks Thursday, Marechal-Le Pen said she is not offended by President Donald Trump's "America First" agenda and she railed against Muslim immigration and "the development of an Islamic counter-society in France."

"After 40 years of massive immigration, Islamic lobbies and political correctness, France is in the process of passing from the eldest daughter of the Catholic Church to the little niece of Islam, and the terrorism is only the tip of the iceberg," Marechal-Le Pen said.

She also decried some modern family structures.

"We have the right to order a child (from) a catalog, we have the right to rent a woman's womb," Marechal Le-Pen said. "We have the right to deprive a child of a mother or father. No, you don't…We don't want this atomized world of individual without gender, without father, without mother and without nation.”

Her remarks were met with cheers from the CPAC audience.

Marechal-Le Pen’s grandfather, Jean-Marie Le Pen, founded the patriot National Front party in 1972.

His daughter, Marine Le Pen, took the reins of Front National in 2011. She lost last year's presidential election to Emmanuel Macron,a former investment banker.

Following that loss, Marion Marechal-Le Pen, who had been a member of Parliament, announced that she is stepping away from politics to focusing on developing a private higher education program in Lyon to rear future conservative leaders.