The couple, who met on the set of their film "The Green Lantern" and have been dating since last year, married in an intimate ceremony with only good friend Florence Welch in attendance, reported People magazine.
Wedding rumor was fueled by the sightings of Lively's mother and sister in town. A white tent was erected at the plantation to house the guests consisting of family members and close friends. A cake was sent down from Virginia for the occasion.
Welch sang three songs before a DJ took over to spin decks at the party.
It's the first marriage for Lively and the second for Reynolds, who was previously married to actress Scarlett Johansson.
Lively previously dated actor Penn Badgley for three years and was linked to actor Leonardo DiCaprio.