Inside French president Emmanuel Macron and Brigitte Macron's marriage

French president Emmanuel Macron and his wife Brigitte Macron (née Trogneux) are a political powerhouse couple.

The pair have a 25-year age gap and first met in the '90s when Brigitte was teaching drama at the high school Emmanuel attended in northern France.

Their relationship has long been fraught with controversy and raised eyebrows because of their ages – Brigitte is 70 and Emmanuel is 45.

But since they tied the knot in 2007, their marriage has gone from strength to strength.

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It wasn't always smooth sailing however, with Brigitte admitting in a recent interview that she waited 10 years before marrying the French president.

To make a relationship work with Macron, Brigitte said she gave up her job, but her children remained her "only obstacles" and she didn't want to "wreck their lives".

"That lasted ten years, the time to put them on the rails," she told Paris Match magazine.

"You can imagine what they were hearing," she added. "But I didn't want to miss out on my life."

France's First Lady touched on her curiosity over what her parents would have said of her decision to marry a former student, especially with her son only three years older than Macron.

Her daughters are also close in age to her second husband, now aged 46 and 39.

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After the pair tied the knot however, the duo became unstoppable with Brigitte, according to many sources, being the president's number one confident and best friend.

Political biographer Gaël Tchakaloff penned a book on the Macrons that claimed the French president checks in on and speaks with his wife at least every 90 minutes, every day.

"There is never an hour and a half that passes without them talking to one another," Tchakoloff writes in Tant Qu'on est Tous les Deux (While We're Alone).

According to Tchakaloff, who was friends with Brigitte for five years, the Macrons are fiercely close, and Emmanuel relies on Brigitte's wisdom and guidance, which is said to have helped him secure his 2017 election victory, when he was a relatively unknown candidate.

The duo met when Emmanuel was aged 15, and was a student in one of Brigitte's classes alongside her daughter, who is the same age as Emmanuel.

Per Paris Match, Brigitte, who was a teacher at the Jesuit-run provincial school in northern France that her now-husband attended, was courted by Emmanuel when he was still a student.

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"At the age of 17, Emmanuel said to me, 'Whatever you do, I will marry you!'" Brigitte told the publication.

Brigitte is, by her own account, also well-aware of the age difference and the reaction it was met with when they entered the world stage.

"The only problem is that he's younger than me," she said of life married to the president of France during an interview with Elle in 2017.

Per The Telegraph, readers of Tant Qu'on est Tous les Deux get the sense the couple are mutually dependent, and Emmanuel would be lost without Brigitte.

Tchakaloff, however, acknowledged the 90-minute window was "a figure of speech," wanting more to convey that the couple speak with each other "as often as they can."

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At the Élysée Palace, which is the official residence of the French Republic's President, Tchakaloff says Brigitte's office is on the ground floor, while Emmanuel's is on the first floor – and when they're both in residence, they pop in to see each other "constantly."

"When he's travelling, he phones her all the time," Tchakaloff says.

The couple reportedly have a shared schedule, and know what the other is doing "minute by minute."

Tchakaloff said Brigitte and Emmanuel did not want her to write the book, and presidential staffers called her to ask her to stop.