This will mark the Bidens' first in-person visit to the queen of England since stepping into their roles this past January.
Of course, the queen has met with many American presidents during her almost 70 years on the throne. Most recently she has hosted President Donald Trump and first lady Melania Trump as well as President Barack Obama and first lady Michelle Obama.
In fact, President Obama recently shared a touching story of meeting the queen's late husband, Prince Philip, at Windsor Castle.
This spring, Obama remembered Philip, who died at the age of 99 in April, with the moving post.