They've only been dating for about a year but Ryan has put a ring on the Gossip Girl star, according to People.com.
The Green Lantern co-stars, who began dating last year, tied the knot on Sunday at the picturesque Boone Hall Plantation in Mount Pleasant, South Carolina.
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The bride and groom went all out for their nuptials - a cake was driven down from Virginia for the event, while Florence Welch - a close friend of Lively's - put on a small set at the reception under a white tent.
Blake previously dated her Gossip Girl co-star Penn Badgley and enjoyed a brief romance with Leonardo DiCaprio, while The Proposal hunk split from wife Scarlett Johansson in 2010.