Kate Middleton is a Plaid Princess

Birthday girl Kate Middleton turns 26 on Wednesday and arrives back at her West London home in a cute plaid skirt.

On-again, off-again, on-again boyfriend Prince William was no where in sight.

Kate has recently been given her own separate security detail, perhaps forecasting a royal engagement in the future!

The Harewood Estate in England has recently seen a lot of activity and has long been rumored to be the possible home for Prince William and his future wife.