It's been revealed the Duke and Duchess told the royal family on Friday, when they attended Princess Eugenie and Jack Brooksbank's wedding.
A third, more intimate, picture is of the newlyweds sharing a kiss in the Scottish State Coach as they returned to Windsor Castle following their procession through the streets of Windsor after the ceremony.
Trump's reference to Princess Eugenie having "been through so much" may be a reference to some of the family drama between Sarah "Fergie" Ferguson and Prince Philip that has resurfaced leading up to the wedding.
In a separate image, Princess Eugenie and her husband look on gleefully as Mia Tindall, Savannah Phillips, Prince George, Princess Charlotte, Theodora Williams, Isla Phillips, Louis De Givenchy, and Maud Windsor gather around them.
The royal wedding of Princess Eugenie and Jack Brooksbank was a big hit in terms of British TV viewership.
As Princess Eugenie walked in wearing her stunning Peter Piloto gown and the Queen's Greville Emerald tiara, Kate Middleton and Meghan Markle's faces were pure joy.
Following the ceremony, Queen Elizabeth is set to host an afternoon reception in St George's Hall at the castle, whilst an evening party will take place at the York family home, the Royal Lodge, in Windsor Great Park.
The attractive bride has just arrived at the chapel wearing a stunning Peter Pilotto and Chirstopher De Vos wedding dress. Using the American designer's signature draping to accentuate the bride's hourglass figure, the dress also boasts two embroideries of the White Rose of York on the shoulder and back.
Fashion editor Antonia Kraskowski writes that Eugenie looked "radiant" in the gown, which included "details meaningful to the bride and her new husband". Her Majesty The Queen; His Royal Highness The Duke of Edinburgh, Prince Geroge and Princess Charlotte were all in attendance.
The US President referred to "yesterday" when he tweeted his praise on Sunday afternoon, two days after Eugenie tied the knot with Jack Brooksbank on Friday.