Parts of the English countryside will soon be moving into lockdown as the royal family flocks to celebrate Pippa Middleton's wedding to millionaire James Matthews.
The Duke and Duchess of Cambridge and Prince Harry are going, and Prince George and Princess Charlotte have starring roles.
2011 saw the biggest royal wedding of a generation - a fairytale princess bride and a dashing prince. But what really got people talking that day? The bridesmaid and that dress.
Now that bridesmaid, Pippa Middleton, is the bride.
The wedding will take place at St Mark's Englefield, not far from the English country village where the Middleton sisters grew up.
A toddling Princess Charlotte will be a bridesmaid, her brother Prince George, a page boy.
Parents the Duke and Duchess of Cambridge are guests - just guests - so as not to steal the bride's thunder. But it's Prince Harry and his famous new squeeze, actress Meghan Markle, who might not be able to help it.
The marriage takes place Saturday (UK time) at 11:30pm.
Watch the video for Tova O'Brien's full report.