WASHINGTON (AP) — Jill Biden has celebrated the athletic grit of wounded service members with Prince Harry, discussed the value of early childhood education with Princess Kate and sipped tea poured by Queen Elizabeth II.

Now the first lady is back in London for another royal engagement.

President Joe Biden has dispatched his wife to represent the United States at Saturday’s coronation of King Charles III, the late queen’s eldest son.

No American president has ever attended a British coronation.

While in London, she’s engaging in a bit of soft diplomacy before the big event.