According to sources, Armani has designed five different outfits for Holmes for various events taking place on the wedding weekend.
An Armani spokesperson declined to comment Wednesday.
Last week in Paris, Holmes confirmed that she already has her wedding dress picked out, and she was also spotted in Milan, where Armani is headquartered.
It wouldn't be the first time the designer has ministered to top secret nuptials. In 2003, he designed the gown and tuxedo for Russell Crowe and Danielle Spencer's Sydney wedding.
Cruise and Holmes donned Armani at Oprah's Winfrey's Legends Ball in Santa Barbara in May 2005 and also during the international press tours for their films "Mission: Impossible 3" and "Batman Begins."
For complete coverage see tomorrow's issue of WWD.