The actress got engaged to Justin Timberlake last December and has previously admitted to having not yet planned the ceremony.
"It's very exciting - it's just hard to find the time, honestly!" Biel told ITV1's This Morning.
"But it's a good moment just to enjoy it and take it easy."
Of the style of her wedding, she added: "I have no idea... I am one of those people who is not very detail-oriented.
"In my life I don't think I'm 'this has to be this way, and this way' - more of a big idea person... so I'll probably give an idea and let it be created.
"I feel like most of my friends, bless them, always go through some sort of something - one day of Bridezilla - so maybe it's just part of the experience, you just have to do it!"
Biel has said that she never expected to get engaged but that when it happened "it was just right".