Jessica Simpson can't decide where to get married.

The 33-year-old star will tie the knot with former NFL player Eric Johnson in just a few weeks, and though they have booked the 78-acre Bacara Resort & Spa in Santa Barbara for their nuptials, the blonde beauty is still undecided as to whether she actually wants to get married there.

A source told Us Weekly magazine: ''They've booked it for now. But Jess keeps going back and forth on locales.''

According to the friend, the couple - who have children Maxwell, two, and Ace, 12 months, together - have been decisive on some aspects of the wedding, with the guest-list finalised and a theme settled on.

The source told Us Weekly magazine: ''The wedding will be very rustic-chic.''

And it was previously revealed Jessica - who was previously married to Nick Lachey - has her wedding gown all ready.

A source said: ''Jessica is having something unique made. It will be very different from the Vera Wang she wore to wed Nick Lachey.''

The bride's sister Ashlee Simpson has said she is thrilled with the bridesmaid dress she will wear on the big day.

She said: ''My dress is really beautiful! It's really, really stunning.''