The lucky couples tied the knot during a private, 15-minute ceremony on the ledge's glass-floor balconies that extend 4.3 feet from the building structure.
RELATED: Now you can hire 'Bachelor' host Chris Harrison to officiate your wedding
[Ads /]
During the ceremony, the couples received complementary photos and celebrated with breakfast, a champagne toasts and special offerings onsite. The couples also received a stay at Swisstel in downtown Chicago for a pre-ceremony getaway.
The Skydeck is the highest observation deck in the U.S., located on the Willis Tower's 103rd floor at 1,353 feet in the sky.
[Ads /]
RELATED:2 dogs get married in extravagant puppy wedding in Chicago
To date, there have been 1,000 known marriage proposals, 116 weddings, 18 vow renewals on the ledge.
For more information, visit www.facebook.com/Skydeckchicago.