Kate Middleton looked gorgeous in a baby blue dress.
Her procession was accompanied by a Sovereign's Escort of the Household Cavalry, made up of Life Guards and Blues and Royals, in their silver and gold breastplates and plumed helmets.
Also riding in the ceremony for the first time was the Duke of York in his new role as Colonel of the Grenadier Guards.
The Countess of Wessex, Lady Louise Windsor, Princess Beatrice and Princess Eugenie shared a carriage behind them.
As the entire British monarchy stood on the balcony of Buckingham Palace on Saturday to celebrate the Queen's birthday parade, one tiny member was noticeably missing from the festivities.
At 1pm, the royals gathered on the balcony for the RAF flypast featuring 23 modern and historic planes, Meghan taking centre stage.
"For myself, being the first turban-wearing Sikh to troop the colour and to be part of the escort it is a really high honour for myself, and hopefully for everyone else as well", said Lall from Leicester, who came to the United Kingdom from India as a boy. Flags, or colors, were "trooped" so soldiers in the ranks would be able to recognize them.
And royal fans were delighted to see Markle and Prince Harry (The Duke and Duchess of Sussex) join her on the famous balcony.