The movie star couple exchanged vows at Boone Hall Plantation in Mt. Pleasant, South Carolina on 9 September (12) and Stewart was asked to mastermind the private event.
Speaking out about the ceremony for the first time, Stewart tells Life & Style magazine, "They're good friends of mine who live around the corner from me, so we got involved that way because it's through friendship.
"Our wedding team helped Blake orchestrate the event, and they did a phenomenal job. Nobody does it better than our weddings team!"
Photos from the big day will be featured in the December (12) issue of Martha Stewart Weddings.