(Cover) - EN Showbiz - Katie Holmes has revealed her biggest worry on her wedding day was about the seating arrangements.

The actress married Hollywood superstar Tom Cruise in 2006 at an extravagant ceremony in Italy, and says she never expected to feel anxious about trivial things on the day.

The 31-year-old beauty admits she thought the day would be much more serious than it actually was, and says once she relaxed everything went smoothly.

"I just remember you kind of mock up that day to be so serious and so important, it's your wedding day," she told Entertainment Tonight.

"I just remember like, 'Oh my God, what if people don't know where to sit?' Like those little tiny things. But actually it's all going to be OK."

Katie was discussing her big day because shes currently promoting new movie The Romantics, about a group of friends who reunite for a marriage.

Her co-star Josh Duhamel added that he also has fond memories of the day he married his wife, Black Eyed Peas singer Fergie.

Josh says his own wedding was much more enjoyable than the problematic nuptials portrayed in the movie, admitting he and Fergie were lucky to have a stress-free ceremony.

"It isn't sort of a glossy perspective on marriage, it's sort of the real dilemmas people go through leading up to a marriage and often times the conflict that goes with it. Luckily I didn't have to go through any of this," he explained.

Josh and Katie join a host of other big names in The Romantics, including Anna Paquin, Candice Bergen, Adam Brody and Elijah Wood. (C) Cover Media