Royals How Prince George, Princess Charlotte and Prince Louis Have Been Preparing for Royal Life This Year For Kate Middleton and Prince William's three children, 2020 was a big year full of milestones By Stephanie Petit Stephanie Petit Stephanie Petit is a Royals Editor, Writer and Reporter at PEOPLE. People Editorial Guidelines Published on January 8, 2021 02:47 PM Share Tweet Pin Email Trending Videos Prince William with Prince George, Princess Charlotte and Prince Louis. Photo: The Duchess of Cambridge 01 of 13 Prince George started 2020 with an important photo: posting with great-grandmother Queen Elizabeth and her three heirs. The new portrait with the monarch, grandfather Prince Charles and father Prince William was released by the palace to mark the start of a new decade. 02 of 13 Princess Charlotte, Prince Louis and Prince George starred in an Instagram video in March 2020, participating in the Clap for Carers movement amid the coronavirus pandemic. 03 of 13 Princess Charlotte and Prince George. Like children around the world, Princess Charlotte and Prince George had to adapt to homeschooling — and its challenges. Kate said, "George gets very upset because he just wants to do all of Charlotte's projects. Spider sandwiches are far cooler than literacy work!" 04 of 13 Prince Louis celebrated his second birthday with his most adorable photos yet, featuring his hands covered in paint as he worked on a painting to support the National Health Service. 05 of 13 The whole family participated in the Clap for Carers campaign in April, with Charlotte leading the way with her applause. 06 of 13 For her fifth birthday, Princess Charlotte appeared in her most grown-up photos yet. 07 of 13 Princess Charlotte and Prince George lended a helping hand amid the COVID-19 crisis, helping their parents pack up and deliver food packages for locals in need. 08 of 13 There's nothing like some royal backyard rumbles! Prince William marked his birthday in June with new portraits starring his children and taken by Kate. 09 of 13 Prince George showed off his smile (complete with his incoming adult teeth!) for his 7th birthday portraits in July. 10 of 13 Prince George, Princess Charlotte and Prince Louis made their first public speaking appearance in October, asking their very own animal questions to naturalist Sir David Attenborough in a video shared on social media. 11 of 13 Kate Middleton, Prince William, Prince Louis, Princess Charlotte and Prince George. Max Mumby/Indigo/Getty The Cambridge kids made their red carpet debut in December during a night out at the theater. 12 of 13 Prince Louis, Princess Charlotte and Prince George. AARON CHOWN/POOL/AFP via Getty Princess Charlotte showed off her independence by letting go of her dad's hand to walk the red carpet solo! 13 of 13 The Cambridge family's 2020 Christmas card. Matt Porteous / The Duke and Duchess of Cambridge/Kensington Palace via Getty Prince George, Prince Louis and Princess Charlotte showed off their contagious smiles in their family's 2020 Christmas card.