TOM CRUISE and KATIE HOLMES are celebrating their one-year anniversary today! ET was there for the star-studded nuptials at Castle Odescalchi and we're taking you back to Italy for all the wedding-day mayhem with this exclusive video!

Exactly a year ago on Saturday, Nov. 18, the Top Gun and his lady love were married just after sunset at Castle Odescalchi, overlooking Lake Bracciano, outside of Rome, Italy, before more than 150 close family and friends. Celebrity guests attending the wedding of the year and/or pre-wedding events included BROOKE SHIELDS, JENNIFER LOPEZ and hubby MARC ANTHONY, DAVID and VICTORIA BECKHAM, WILL SMITH and wife JADA PINKETT SMITH, JIM CARREY and girlfriend JENNY McCARTHY, CATHERINE BELL and JENNA ELFMAN, along with Tom's 'M:i:III' director J.J. ABRAMS, 'Vanilla Sky'/'Jerry Maguire' director CAMERON CROWE, and Tom's 'Top Gun' producer JERRY BRUCKHEIMER.

Katie wore a fitted GIORGIO ARMANI off-the-shoulder bridal gown with a train in ivory silk caddis adorned in VALENCIENNES lace and SWAROVSKI-beaded crystal embroidery, featuring a delicate crinoline frill at the shoulders and a silk soleil border around the hem. The gown was complemented by an ivory tulle, floor-length veil and ivory silk shoes. For a wedding gift, Katie reportedly gave Tom a watch from the world's oldest watchmaker, VACHERON CONSTANTIN, valued at $23,000, and she had the Malte Dual Time Regulator in Rose Gold engraved with a sentimental "I Love You" message on the back.

After the ceremony, guests were treated to cocktails featuring specially prepared Italian hors d'oeuvres followed by a multi-course meal. As the evening wound down, the bride and groom cut the five-tiered white chocolate wedding cake, which was decorated with marzipan roses and was studded with white-chocolate chips; it also featured white-chocolate mousse and a white-chocolate cream filling.