Credit: ITV

The wedding of the year is almost here!

Downton Abbey Season 3 premieres tonight (Sunday, January 6) for U.S. viewers, and Entertainment Weekly shared a preview of Lady Mary's wedding dress for when she (finally) walks down the aisle with Matthew Crawley.

According to EW (via People.com), Mary's dress is the most expensive outfit on the show so far. For example, "a vintage veil will be anchored on Mary's head by a 45-carat floral diamond tiara, valued at $200,000, from U.K. jeweler Bentley & Skinner." Cha-ching!

The gown itself — which you can preview in photos here — is a long-sleeve cream-colored dress featuring rice pearls and Swarovski crystals. It took eight weeks to create. Mary's bouquet is made of white Calla Lilies. Check out several wedding spoiler photos here. Everything looks gorgeous!

Will you be watching the new season? Are you excited for the big wedding ... even though these spoilers make us nervous for the future?

Sources: People, Entertainment Weekly