Meghan Markle, Prince Harry make first official appearance as newlyweds

Prince Harry and Meghan Markle made their first official appearance Tuesday, just three days after the royal wedding.

The newlyweds were pictured at a Buckingham Palace garden party for Prince Charles’ 70th birthday party. Markle, 36, wore a dusty pink dress by the British brand Goat and a matching Philip Treacy dome hat, Sky News reported.

Meghan, the Duchess of Sussex attends a garden party at Buckingham Palace in London, Tuesday May 22, 2018, her first royal engagement since her wedding to Prince Harry on Saturday. The event is part of the celebrations to mark the 70th birthday of Prince Charles.  (Dominic Lipinski/Pool Photo via AP)

Meghan Markle and Prince Harry make their first official appearance as newlyweds.  (AP)

She followed royal protocol and wore sheer pantyhose underneath her dress. Harry was pictured in a suit and top hat.  

More than 6,000 people from charities the Duke of Wales supports attended the event. Tuesday’s birthday celebration comes months before Charles' actual birthday on Nov. 14. The event was mostly to celebrate Charles' achievements. 

Britain's Prince Harry speaks, as Prince Charles, Camilla, the Duchess of Cornwall and Meghan, the Duchess of Sussex listen, during a garden party at Buckingham Palace in London, Tuesday May 22, 2018. The event is part of the celebrations to mark the 70th birthday of Prince Charles.  (Dominic Lipinski/Pool Photo via AP)

Prince Harry speaks at a birthday celebration of Prince Charles.  (AP)

"You have inspired William and I, and looking out here today, it is clear to see that we are not alone," Harry said in his speech at the party about his father. "You have created an incredible body of work that has, and will continue to make such a huge difference to so many people's lives." 

MEGHAN MARKLE, PRINCE HARRY RELEASE OFFICIAL ROYAL WEDDING PHOTOS

Meghan, the Duchess of Sussex and her husband Prince Harry walk as they attend a garden party at Buckingham Palace in London, Tuesday May 22, 2018, their first royal engagement since marrying on Saturday. The event is part of the celebrations to mark the 70th birthday of Prince Charles.  (Dominic Lipinski/Pool Photo via AP)

The couple postponed their honeymoon and haven't released details on when and where it will take place.  (AP)

Markle previously said she wants to “hit the ground running” after getting married to become a full-time member of the royal family. Harry and Markle said “I do” on Saturday at St. George’s Chapel at Windsor Castle as millions of people watched.

The newlyweds are delaying their honeymoon and haven’t said when and where they will be going. However, they are expected to head to Namibia or Botswana. 

The newly named Duke and Duchess of Sussex are now living at Nottingham Cottage on the grounds of Kensington Palace.

Katherine Lam is a breaking and trending news digital producer for Fox News. Follow her on Twitter at @bykatherinelam