Lively quietly wed her Green Lantern co-star in Mount Pleasant, South Carolina on Sunday (09Sep12).
Only about 60 guests attended the ceremony, and details of the nuptials were kept so tightly under wraps, her Gossip Girl castmates were kept in the dark, including Badgley, who she dated until 2010.
The 25 year old, who is now in a relationship with singer/actress Zoe Kravitz, tells People.com, "I actually didn't know until last night, but I think it's fantastic. I couldn't be happier for her."
This was Reynolds' second trip down the aisle - he separated from Scarlett Johansson two years ago.