Already a keen fan of running, healthy eating and keeping her skin in tip-top condition with regular facials, the bride-to-be will no doubt be glowing on May 19th.
Here are some ways the bride-to-be is making sure she feels her best self ahead of her big day.
Yoga and Pilates
Meghan's love of yoga stems from her mother Doria Ragland, an instructor who encouraged her daughter to practise the discipline from a young age.
"There are so many benefits that come with the practice of yoga," Meghan gushed to Canada's Women's Health Magazine in 2015, "increased flexibility and muscle strength, greater happiness, increased mental focus, a greater ability to relax, decreased anxiety and better sleep."
She counts 'intense' vinyasa' and hot yoga among her favourite versions of the practise.
Lately the bride-to-be has become a fan of pilates - platinum pilates in particular, a studio chain in LA founded by her pal Heather Dorak.
Pilates Platinum us a high intensity pilates class which combines cardio with flexibility and strength - and Meghan has described it as "hands down the best thing you could do for your body".
"Pilates Platinum is hands down the best thing you could do for your body,' she said to fitness glossy Women's Health UK. "There are so many workouts that you try out once and never go back to; Heather's studio is the complete opposite," she explained.
Meghan's lifestyle blog The Tig journaled some of the bride-to-be's favourite workouts, healthy eating and skin care tips before she closed the site around the same time rumours of her relationship with Britain's Prince Harry gained pace.
The bride to be has said that working out is as much for her mind as her body, calling exercising her 'thing': "It's sort of my thing'" she has said, "my health, my state of mind, the feeling you have after a workout: all of these things drive me to stop on to my mat or go to the gym."
She enjoys running, however has said that since getting older it has become 'hard on my knees' and so she no longer runs outside like she used to.
Cardio and Strength Classes
Meghan has also said she's a fan of popping to the gym to work out with a friend, and in London that friend is Made in Chelsea star Millie Mackintosh, who 'raves' about celebrity trainer Russell Bateman's invite-only fitness class 'The Skinny Bitch Collective' (SBC).
Bateman's 50 minute cardio and strength classes combine "high intensity and animalistic movements that completely throw you out of your comfort zone," and piqued Meghan's interest when she visited London back in 2015.
"I'm eager to come to the UK to do a workout with Russell, the founder of SBC," she told Women's Health at the time. "My friend Millie Mackintosh raves about his workouts, so I’ll call her up to do a class together next time I’m back in London."
Before it closed, Meghan's lifestyle blog The Tig chronicled some of the former actress's favourite meals.
Meghan has described herself as a 'foodie' before and indeed seems to be at home in the kitchen - she got engaged to Prince Harry as the two cooked a roast chicken, and she reportedly only kept one thing from her first marriage - her blender (her former Suits co-star has even joked that he'll be buying her a 'classy' Vitamix as a wedding gift).
"I definitely try to eat as clean as possible. I definitely just try to avoid the things that I know are going to make me feel lethargic or sluggish," she once told Shape. I eat mostly just fish and veggies - but I am also a foodie."
She loves a carb, and when she was filming, she said she cut out meat and meat products during the week, but the weekends are when she eats anything she thinks she might crave over the weekend,: "I could eat French fries all day. And I love pasta. I love carbs... when I’m filming, I’m conscious of what I eat. I try to eat vegan during the week and then have a little bit more flexibility with what I dig into on the weekends.
"On the weekends all bets are off, I think if you deprive yourself of anything you're just going to crave it more, so for me it's just finding that balance. Eating really good during the week and then treating yourself to whatever it is that you want over the weekend," she told Shape.
Green Juice, not Coffee
For an energy boost, unlike many of the rest of us Meghan doesn't opt for the quick jolt of a strong espresso, instead choosing a immune-boosting green juice as her perky weapon of choice.
"Definitely a green juice," she told Shape magazine. "I think that trying to go for coffee or anything like that only end up hurting you in the end so to get a really good natural source of energy, have a great green juice or even a kombucha - I'll have that sometimes.
Meghan's London-based facialist Nicola Joss is the woman behind the bride-to-be's polished skin.
"I do facial exercises from one of my favorite aestheticians, Nicola Joss, who basically has you sculpt your face from the inside out," she told beauty site Birchbox, "I swear it works, as silly as you may feel.
"On the days I do it, my cheekbones and jawline are waaaay more sculpted. There’s a reason she is in high demand around awards season when every actress wants to look A-plus."
Facialist Nicola has offered her tips for all brides ahead of their weddings too, promoting the face massage Meghan is a fan of, as well as advising brides to avoid any aggressive skin treatments up to two-months before their bid day.
"You want to start getting regular massages from the beginning of your skincare journey, since it not only helps remove the tension in the face, but it also really helps improve the texture of when you massage with a good, clean facial oil."
"The last two months before your wedding should be focused on getting calmer, more hydrated skin, rather than getting more aggressive with your face, since corrective treatments can require a ton of downtime and healing."