Drew Barrymore's Wedding Day: The Dress! The Fab Cocktail Party!

Just a day after

the makings of the pregnant thesp's big day—including the gorgeous gown she donned for the occasion. So, what did Barrymore wear as she walked down the aisle? MORE: Drew Barrymore Marries Will Kopelman While we don't have pics of the wedding dress just yet, we do know the 37-year-old actress wore a custom long, white Chanel dress pleated in muslin and organza, created for her by Karl Lagerfeld. The dress, which was accentuated at the waist by a black satin belt, also had flowers embroidered in organza, muslin, tulle and feathers along the skirt of the dress. Barrymore was also wearing Chanel fine jewelry. MORE: Drew Barrymore's Rehearsal Dinner Details! Sources tell E! News that guests enjoyed a pre-ceremony cocktail party on the lawn of Drew's Montecito, Calif., estate before being ushered into the marquee tent for the emotional service, which lasted 45 minutes. The groom's family rabbi, flown in from New York, did the honors. Children of the couple's friends served as flower girls and ring bearers. After the ceremony, Will and Drew took wedding pictures in the garden. For the reception, Drew chose an '80s tribute band since she loves the era and thinks it's the most fun. We're sure the guests agreed. The bride and groom left the house at 2 a.m. in a classic Mercedes that was decorated with streamers and roses tied to the back. No word yet on their honeymoon plans, but the newlyweds spent their wedding night at the nearby San Ysidro Ranch. Congratulations you two love birds!