With less than three weeks until the bigger than big day, Prince Harry and Meghan Markle‘s royally hectic wedding prep has kicked into overdrive. And no, we’re not just talking about perfecting table settings, choosing between this or that tiara, and booking in that last-minute teeth whitening appointment.

According to The Daily Mail, everybody’s favorite ginger-haired royal is also overhauling his diet ahead of the wedding. He’s reportedly “following his fiancée’s love of clean eating” and has lost more than six pounds as a result. “Meghan has completely changed Harry’s diet,” a source told the publication. “She’s got him juicing and he has lost at least half a stone, which is a lot for someone as skinny as he is.”

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The strict new regime involves swapping carbs and processed foods for “kale and quinoa” and cutting back on meat. “They have bought a top-of-the-range juicer and she has him on fruit and veg smoothies. She’s also weaning him off meat,” the insider continued.

The news outlet also reports that Harry has joined “an exclusive $694-a-month gym” (that’s roughly $1,268). Meghan, too, is taking steps to ready herself for the upcoming nuptials.

According to a recent report in UK publication The Sun, Canadian stylist Jessica Mulroney has touched down in London to help the bride-to-be with a very important wedding task! Jessica is in the British capital to enjoy a girls’ weekend and to accompany Meg — her best friend — to her final, top-secret dress fitting. “She is the real power behind the throne in this royal wedding and has been invaluable,” the source noted.

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Meghan and Jessica.

“Although Jess lives in Toronto, the two are on the phone all the time. Meg wanted Jess at the final fitting as it’ll be the most famous dress of the year and she’s quite nervous about it. It all went really well and they were delighted with the result,” the source added. So far, Jess is one of the only souls that has been given a sneak peek of Meghan’s gown.

“The dress is the biggest secret of the wedding – not even Harry knows who’s designing it,” the insider confirmed. “The dress has had to be taken in a bit as Meg has lost a bit of weight, but that’s entirely normal for all brides before their big day.” Harry, 33, and Meghan, 36, will exchange vows at St George’s Chapel at Windsor Castle on May 19.

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This post was written by Candice Mehta-Culjak. It originally appeared on our sister site, Now to Love.