Royals Prince Harry's Personalized Computer Case Reveals What Son Archie Calls Him Harry previously shared some of Archie's first words, including his names for mom and dad By Stephanie Petit Stephanie Petit Stephanie Petit is a Royals Writer/Reporter at PEOPLE. She has been with the brand since 2016 after graduating from The College of New Jersey and holding previous positions at Seventeen, CBS Radio and more. Follow the proud dog mom on Twitter at @stephpetit_ for the latest on Queen Elizabeth's corgis. People Editorial Guidelines Published on September 24, 2021 03:10 PM Share Tweet Pin Email Meghan Markle and Prince Harry. Photo: Taylor Hill/WireImage Prince Harry may have royal titles, but one of the most important things he's called is "Archie's Papa." As Harry and Meghan Markle kicked off their cross-country trip to New York City on Thursday, he saw seen carrying a laptop case with the words "Archie's Papa" on it. The couple are parents to 2-year-old son Archie Harrison and 3-month-old daughter Lilibet Diana. Archie and Lili, as they plan to call their daughter, stayed in California during their parents' trip to New York, which marks the couple's first joint outings since Lili's birth in June. Prince Harry previously shared in his AppleTV+ docuseries The Me You Can't See that "papa" was one of Archie's first words, followed by a sweet nod to Princess Diana. "I got a photo of her in his nursery, and it was one of the first words that he said — apart from 'mama,' 'papa,' it was then 'grandma.' Grandma Diana," Harry shared. "It's the sweetest thing, but at the same time, it makes me really sad because she should be here." The Best Photos from Meghan Markle and Prince Harry's Visit to New York Alexi Rosenfeld/GC Images Prince Harry, 37, has been a proud parent from the start. Just days after welcoming Archie in May 2019, he sported a jacket with the words "Invictus Family Daddy" embroidered on it in bold lettering during a visit to the Netherlands. Meghan, 40, and Harry also have plenty of nicknames for their firstborn — Harry has referred to Archie as his "little man," while Meghan called her son "Bubba" during their fall 2019 tour of Africa. Meghan Markle, Prince Harry and Archie. Henk Kruger/AP/Shutterstock Meghan and Prince Harry announced earlier this week that they were heading to New York for Saturday's Global Citizen Live from Central Park "to continue their urgent work with world leaders in the pursuit of global vaccine equity to end the COVID-19 pandemic for everyone, everywhere," according to Global Citizen. Can't get enough of PEOPLE's Royals coverage? Sign up for our free Royals newsletter to get the latest updates on Kate Middleton, Meghan Markle and more! They kicked off their trip on Thursday with a visit to One World Observatory at the World Trade Center with Mayor Bill de Blasio, the mayor's wife Chirlane McCray, their son Dante de Blasio and Governor Kathy Hochul. The couple also visited the 9/11 Museum and memorial, just weeks after the 20th anniversary of the attacks. On Thursday afternoon, Meghan and Harry met with US Ambassador to the UN Linda Thomas-Greenfield. "Wonderful meeting with Prince Harry and Meghan, The Duke and Duchess of Sussex," Thomas-Greenfield tweeted. "Important discussion of COVID, racial justice, and raising mental health awareness."