Prince Harry and Meghan Markle delighted the world on Monday, October 15, with the news that they're expecting their first child in the spring of 2019. Both the Duke and Duchess of Sussex, individually and together, have been candid about their desires to start a family, and during their short time together as a couple, they've had plenty of opportunities to interact with other people's kids. Click through to see some of their most unforgettably adorable moments with children. (Photos via Stefan Rousseau/WPA Pool/Getty Images + Chris Jackson/Pool/Getty Images)

February 2017: Upon arriving in Nottingham, England, in February 2017 to visit Full Effect and Coach Core — two projects supported by the Royal Foundation that work to improve opportunities for young people — Prince Harry greeted some excited younger fans (and their toys!) who came out to welcome him. (Photo by Richard Stonehouse/WPA Pool/Getty Images)

April 2017: At team trials for the 2017 Invictus Games in Bath, England, Harry took the time to work out an elaborate high-five with two-year-old Harry Phillips. (Photo by Chris Jackson/WPA Pool/Getty Images)

May 2017: Prince Harry easily slipped into superhero mode as he hosted a tea party at Buckingham Palace for the children of those who have died serving in the armed forces. (Photo by Andrew Parsons/WPA Pool/Getty Images)

July 2017: During a visit to StreetGames' Fit and Fed at Central Park East Ham, Harry was a hands-on participant as he played with the children in a game of soccer. (Photo by Stefan Rousseau/WPA Pool/Getty Images)

September 2017: During the 2017 Invictus Games in Toronto — the site of Prince Harry and Meghan Markle's first official public appearance together — the young-at-heart prince rode along with Daimy Gommers, 5, as she participated in a driving challenge. (Photo by Gregory Shamus/Getty Images for the Invictus Games Foundation )

September 2017: Another moment from the 2017 Invictus Games in Toronto cemented opinions of Harry as an amazing future dad when he teased toddler Emily Henson with his popcorn at the Sitting Volleyball Finals. (Photo by Chris Jackson/Getty Images for the Invictus Games Foundation)

September 2017: Harry knows the only appropriate way to greet a 7-month-old is with a teeny toe squeeze, and he did just that at the Swimming Finals at the 2017 Invictus Games 2017 in Toronto. (Photo by Chris Jackson/Getty Images for the Invictus Games Foundation )

December 2017: At the European premiere of Star Wars: The Last Jedi at Royal Albert Hall in London, Harry was seen giving 8-year-old Eloisa Lerner a Stormtrooper helmet. The little girl was all smiles (and so was Harry). (Photo by Eddie Mulholland/WPA Pool/Getty Images)

January 2018: When Prince Harry and Meghan Markle visited the new Star Hub fitness facility in Cardiff, Markle watched young dancers in a street dance class, and then gathered everyone for a group hug. (Photo by Geoff Pugh/WPA Pool/Getty Images)

March 2018: After the Commonwealth Day service at Westminster Abbey, Meghan Markle greeted a few of the children in attendance, happily getting down on their level to do so. (Photo by Chris Jackson/Getty Images)

March 2018: Prince Harry and Meghan Markle visited the Titanic Belfast maritime museum and happily took a few minutes to greet the young children who had come bearing flowers. (Photo by Andrew Parsons/Pool/Getty Images)

June 2018: One month after marrying into the royal family, the newly minted Duchess of Sussex cooed sweetly at an infant as she greeted members of the public on her first royal outing with Queen Elizabeth II. (Photo by Eddie Mulholland/WPA Pool/Getty Images)

June 2018: At the official opening of the new Dining Hall at Phelisanong Children's Home in Leribe, Lesotho, Harry got down on the ground to play with the children — and their balloons! (Photo by Chris Jackson/Getty Images for Sentebale)

July 2018: Prince Harry playfully scolded 3-year-old Walter Cullen when the little one reached out to grab Duchess Meghan's hair on their visit to the Gaelic Athletic Association in Dublin, Ireland. (Photo by Chris Jackson/Pool/Getty Images)

July 2018: Meghan Markle and Prince Harry helped to kick off the CoderDojo Girls Initiative at the Dogpatch startup hub in Dublin on a trip to Ireland. (Photo via Jimmy Rainford/Pool/Getty Images)

September 2018: At the Royal Marines Commando Training Centre in Lympstone, UK, Harry met with new recruits as well as the Invictus Games Racing Team, making sure to give their little ones a warm welcome, too. (Photo by Chris Jackson/WPA Pool/Getty Images)

October 2018: Harry made sure the youngest well-wishers were taken care of and could see the proceedings as he and Markle visited Edes House during an official visit to Sussex. (Photo by Daniel Leal-Olivas/WPA Pool/Getty Images)

October 2018: Groups of schoolchildren gathered for Prince Harry and Meghan Markle's official visit to Sussex, and the Duke and Duchess paid them some friendly and playful attention. (Photo by Tabatha Fireman/Getty Images)

October 2018: A group of excited young fans greeted an equally excited Markle as she and Harry arrived at the Royal Botanic Gardens during their royal tour. (Photo via Phil Noble/Pool/Getty Images)

October 2018: A young member of the tribe of K'gari in the Queens Calopy in Fraser Island, Australia, happily welcomed Prince Harry. (Photo via Chris Hyde/Getty Images)

October 2018: While visiting Marenui Cafe in Wellington, New Zealand, one young fan became overwhelmed. Markle's maternal instinct kicked in as she crouched down to speak with him and help ease his nerves. (Photo via Ian Vogler/Pool/Getty Images)

October 2018: During an event for the New Zealand organization Pillars, which provides mentoring to children who have a parent in prison, Markle gratefully accepted a beautiful bouquet of flowers from a young admirer. (Photo via Kirsty Wigglesworth/Pool/Getty Images)

October 2018: Harry happily took the time to meet the stuffed-toy companion of a young fan while greeting crowds in Auckland, New Zealand. (Photo via Chris Jackson/Getty Images)

October 2018: Harry once again proved himself a kid at heart when he crouched to the ground to see a young fan's favorite toy while in Auckland, New Zealand. (Photo via Phil Walter/Getty Images)

October 2018: Harry's competitive streak showed when a young fan demonstrated a game called "Welly Wanging" during the unveiling of The Queen's Commonwealth Canopy in Auckland, New Zealand. (Photo via Dominic Lipinski/Pool/Getty Images)

October 2018: Knowing that toys are serious business to young children, Markle knelt to speak face-to-face with a little girl about her stuffed animal while in Auckland, New Zealand. (Photo via Chris Jackson/Getty Images)

October 2018: Age is nothing but a number, and Harry made sure to greet a smiling infant with the same personable style as any other fan while in Rotorua, New Zealand. (Photo via Michael Bradley/Pool/Getty Images)

October 2018: As the royal couple's fall tour came to a close, the Duchess shared a warm embrace with a young girl who had come out to greet her and Harry during a walkabout in Rotorua, New Zealand. (Photo via Dominic Lipinski-Pool/Getty Images)

January 2019: Back on his native UK soil to start the new year, Harry knelt down to chat face-to-face with a young well-wisher as crowds came out to greet the prince during his visit to a new statue to mark the 100th anniversary of the death of poet Wilfred Owen in Birkenhead, UK. (Photo via Charlotte Graham/WPA Pool/Getty Images)

February 2019: The snowy weather didn't prevent Harry and Meghan from stopping to greet a bundled-up group of children as they arrived at the renovated Bristol Old Vic theatre in Bristol, UK. Harry even helped get the furry coat trim out of one young well-wisher's eyes to better say hello. (Photo via Chris Jackson/Getty Images)

February 2019: During a London event about the importance of children's physical activity, Prince Harry asked some of the young attendants for tips on how to best use the trampolines. (Photo via Chris Jackson/Getty Images)

March 2019: The royal couple made one last pre-baby trip to Morocco, during which they spoke sweetly with some shy young well-wishers at the Lycée Qualifiant Secondary School in Asni. (Photo via Tim Rooke/Pool/Getty Images)

March 2019: Markle was gifted a beautiful flower from Morocco's public Andalusian Gardens as she spoke with some young fans who welcomed the royal couple to the premises in Rabat. (Photo via Facundo Arrizabalaga/Pool/Getty Images)

March 2019: Harry visited St Vincent's Catholic Primary School in Acton, England, to help the students plant a tree from the Woodland Trust, and he took time to say hello and shake the hands of some of the young students as he arrived. (Photo via Alastair Grant/WPA Pool/Getty Images)

March 2019: Harry stopped to admire the artwork that students from St. Vincent's Catholic Primary School in Acton, England, made for the prince when he came to help them plant a tree. (Photo via Alastair Grant/WPA Pool/Getty Images)