It was a dress fit for a bride!
The bride donned a strapless white lace gown with a fitted bodice, her signature red hair pulled back underneath a veil. As one source told E! News, "Jessica's dress was perfect." She completed the look with soft makeup and minimal jewelry.
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Meanwhile, her groom opted for a double-breasted navy suit and printed tie for his wedding ensemble.
The two said "I do!" during a romantic and intimate wedding ceremony at Villa Tiepolo Passi in Carbonera, the groom's family-owned estate in the Italian city of Treviso.
The star's celebrity attendees packed their wedding best for Italy. Her "Interstellar" co-star Anne Hathaway and her "The Hunstman: Winter's War" co-star Emily Blunt sported printed frocks in shades of pink to dinner a day before the wedding.
While many of her famous friends could be there in person to partake in the festivities, some sadly had to miss out. "Congrats @jessicachastain @preposulo," "The Help" co-star Octavia Spencer wrote on Instagram. "I hate that I missed your big day, but know I couldn't be more thrilled for you!!!!"