Meghan spoke to injured veterans about Prince Harry at the Invictus Games and told them: "You are his family".
The duchess, 43, was speaking about her husband's commitment to the event during a behind closed doors welcome reception for competitors in Vancouver on Friday night.
She made the remarks while introducing her husband, who has suffered high-profile fall-outs with his father King Charles and his brother , on stage at the event at the competition's main venue the Vancouver Convention Centre.
It was the couple's first public outing together since the publication of a distressing Vanity Fair cover last month. Meghan, who was dressed in a long brown ensemble, said of Harry: "You will see him throughout this week, you will see him at the Games, you will see him probably curling with you, cheering you on. He wants to be there with you, he is in it with you.
"What you won't have seen is all of the moments in the lead-up to these Games. All of the moments with, as you know, with families, the big rush in the morning and getting ready for school and packing the lunch boxes and making breakfast and my husband's in all of that with us.
"And then he'll be on his phone and Archie will say 'papa, why are you on your phone?'. He's like 'cos it's Invictus... I'm getting ready for Invictus'. It means so much to him.
"You are his family, just as we are his family, and I hope you recognise how much of his heart he has poured into every single beat that has gotten all of you to this week that is going to be spectacular. I need you to know that, I need you to know how much it means to him and how much each of you means to you."
Meghan spoke at the event, which was held just hours after she and Harry touched down in Vancouver after travelling on a private plane together from Santa Barbara, close to their home in Montecito.
They were later seen arriving at Vancouver's five-star Fairmont Pacific Rim, where they are staying, in a convoy of three large blacked-out SUVs, ahead of the start of the nine-day event, which will begin on Saturday afternoon with a star-studded opening ceremony featuring live performances by a host of stars, including , Chris Martin and Nelly Furtado. Harry is also set to make a speech on stage at the event in front of a sold-out audience of 40,000 people at the city's BC Place stadium.
The couple are no strangers to the area having moved to nearby Vancouver Island immediately after they quit royal duties in what became known as 'Megxit' in 2020. They later moved to Montecito in Meghan's native California, but are both known to be keen lovers of Canada after also starting their relationship with secret dates and stays in Toronto, where Meghan lived while filming the TV drama Suits, for five years.
Beginning her remarks on Friday night, Meghan said: "I was not planning on speaking tonight and we just arrived, I don't know, a couple of hours ago and I touched Candian soil and I went 'ohh, feels like home!'.
"We are so excited. We also recognise that most of you are probably so exhausted from how much travel you've done, how much adrenaline you have pumping, how excited you are for what is going to be one of the most outstanding, memorable, unforgettable and connective weeks probably for you and your families."
It comes after Meghan and Harry were reportedly left upset by a report in Vanity Fair last month, which included speculation, which has been strongly denied, about the state of the couple's marriage, as well as anonymous allegations about Meghan's alleged management style towards staff.
They were also hit by claims in a new book and harsh criticism following a visit to survivors of the LA fires. However, it appears they are keen to put any negativity behind them.
Organisers say this year's Invictus Games, which comes after previous Games' were held in London, Orlando, Toronto, Sydney, The Hague and Dusseldorf, will be the biggest ever. It will be held at eight separate venues in Vancouver and the ski resort of Whistler, which are on the traditional territories of the Four Host First Nations of Lílwat, Musqueam, Squamish and Tsleil Waututh.
More than 1,900 volunteers have signed up to help stage the £34million event, which will see up to 550 participants from up to 25 nations compete in eleven sports, including six winter ones for the first time in Invictus Games history. They will include Alpine Skiing, Snowboarding, Biathlon, Cross Country Skiing, Skeleton and Wheelchair Curling, as well as Indoor Rowing, Sitting Volleyball, Swimming, Wheelchair Basketball and Wheelchair Rugby.
Speaking on Friday night, Meghan added: "We are just thrilled to be here and I would be remiss if I didn't take the opportunity to introduce somebody who means a lot to me and I know means quite a lot to all of you.
"So it is my entire pleasure and complete honour to introduce to the stage, my husband, the father of our very sweet excited children, who are cheering you on from California... , founder of the Invictus Games, the ."
As Meghan looked on lovingly, Harry joked with the audience asking if anyone was tired, to which there were shouts of 'no!' from the audience.
He laughed before adding: "Well, obviously team Canada is not tired, everybody else had to travel half way round the to be here!".