Jessica Biel Wedding Dress Shops in Paris

By Kristen Mascia and Peter Mikelbank

UPDATED 04/09/2012 at 07:00 AM EDT • Originally published 04/08/2012 at 01:45 PM EDT

It may not be the first item on every bride-to-be's to-do list, but it's often the most important: The Dress. 
And it looks like Jessica Biel may have found hers.

With wedding season fast approaching, Biel, 30, spent Friday on a seven-hour, high-fashion shopping spree in Paris which included stops at the salons of two major bridal designers.

Accompanied by her assistant – armed with a wedding planning book, sources tell PEOPLE – Biel fueled up with a coffee on the Left Bank's Rue de Bac before popping into Giambattista Valli's chic 8th arrondisement studio for nearly two hours Saturday afternoon.

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A source tells PEOPLE that Valli has worked with Biel for years, beginning when "they were both just starting."

"He makes the most fabulous wedding designs," the source added.

She also made another stop at Elie Saab's showroom across town. A source tells PEOPLE that Biel's lengthy visits suggest she may have been in fittings.

Biel also stopped in at a kids' boutique called Bonpoint in the Left Bank, as well as Christian Badou, a nearby kids' furniture shop, 
prompting speculation she may be planning more than just a summer wedding. Visits to Maje, a women's clothing store in the St. Germain area, a French linens shop, and two concept stores rounded out the trip.

A source says that at Merci, one of the concept shops in the Marais neighborhood, she looked at more furniture and children's items.

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The actress is said to have left Paris Saturday to continue her shop-a-thon at another major European fashion capital.

Reps for Biel could not be reached for comment.