But as the minutes ticked down toward the ceremony, rumors began turning into fact as some of the lucky 600 guests with invitations to the wedding itself started arriving in sunny Windsor.
Winfrey, the U.S. talk show queen, was seen strolling through the grounds of Windsor Castle ahead of the service, as was Elba, the British actor who is a star on both sides of the Atlantic for his roles in "The Wire" and "Luther". There's bunting all over the place.
Closely behind was the one and only Oprah Winfrey who looked fantastic in pastel pink, and appeared to be having a good chat with Idris, before heading off to find her seat. Many in the crowd, like Ana Karukin, a Brazilian nurse living in Florida, said they came to witness a moment of history.
As the Order of Service was published on the morning of the wedding, it revealed Harry will wear a ring - not a given for royal men - and Meghan will not promise to obey her husband in the vows.
The guests were ferried to St George's Chapel on luxury coaches, and her friend Gayle King jokingly told CBS on Saturday that the talk show host was not happy at the type of transportation.
The family tableau played out on the broadest possible stage. Dozens of broadcasters set up on the castle grounds for a visual feast.
Weather forecasters are expecting wall-to-wall sunshine, meaning the newlywed couple will be able to ride through Windsor town centre in the open top Ascot landau for their carriage procession.
Then it will be off to the first of two gala receptions. From there, 200 of them will attend an evening affair at Frogmore House.
The chapel service will reflect Markle's American roots. The Most Rev. Michael Bruce Curry, the African-American leader of the Episcopal Church, delivered the sermon, and the musical selections included versions of Ben.
Markle's co-stars in USA television drama "Suits" were also inside the chapel, including Patrick J. Adams, who plays her love interest Mike Ross, Gabriel Macht (Harvey Specter) and Sarah Rafferty (Donna Paulsen).
Blunt has performed at the Invictus Games, an global competition for military veterans set up by Harry.
His sister Jane Fellowes was to read from the Song of Solomon during the service. "I wish that Diana was here, but she's in heaven watching over them".
Kirka and Lawless reported from London.