Kate Middleton was the picture of a calm, happy bride-to-be as she arrived at the Goring Hotel today. Her mom, Carole, and sister, Pippa, also showed off their gorgeous smiles and excitement as they entered the building. Kate is staying at the Central London location for her final night before marrying Prince William at Westminster Abbey tomorrow, though she'll apparently see him one last time before walking down the aisle. Following royal tradition, Kate and William will share a kiss at dusk before parting ways to spend their nights separately. Preparations for the big event have been going on all week long with William and Kate attending a rehearsal with their families yesterday. The "I dos" are just hours away, so be sure to check back here on PopSugar, where we'll be streaming the royal wedding live and posting pictures as the event unfolds.