The bigger the better - some of the hats are massive, like this one with the giant bow and feathers.
Ladies Day at the Royal Ascot horse racing event in Berkshire is famous for its fashionable female race goers, but it's the wonderful and sometimes weird hats that get the heads turning the most. What do you think this hat is about?
It must take hours to make some of these creations, but at least hats like this can double up as umbrellas if it rains!
And this cute creation has a little lego wedding on top!
Yes, you guessed it - some of the hats were tributes to the royal baby that is soon to arrive.
And this gentleman did a good job of upstaging the ladies with his horse hat!
Tracy Rose is a hat designer so it's little wonder her hat is one of the biggest and most ambitious designs of the day!
This hat pays tribute to the red arrows
But it's not just the ladies that were in on the hat action, this guide dog looks super cute in this little feather piece.