The big day is finally here for Jessica Simpson and Eric Johnson. The couple is expected to tie the knot on Saturday, according to multiple reports.

Jessica Simpson Wears No Makeup On A Date Night 

Simpson, 33, and Johnson, 34, who have been together since 2010, will say "I do" in front of their family and closest friends in California. The list includes Simpson's parents Joe and Tina Simpson, her sister Ashlee with fiancé Evan Ross as well as longtime friend CaCee Cobb and her hubby Donald Faison, according to Us Magazine. Photos even caught Ashlee and her beau in the area as they prepared for her big sister's wedding day.

Of course, Simpson and Johnson's two-year-old daughter Maxwell and 13-month-old son Ace will also join in on the festivities.

But, there will be a lot more guests on the list since the singer-turned-fashion designer previously revealed that the wedding will be very big. "Eric's family alone is almost 90 people!" she told USA Today.

Jessica Simpson on Marrying Eric Johnson: 'It's About Time' 

The soon-to-be husband and wife also hosted a Fourth of July party for their wedding guests on Friday at the San Ysidro Ranch in Santa Barbara, Calif. Simpson, a Texas native, made sure to stick to her Southern roots with a menu that included baby back ribs, fried chicken, beef brisket and grilled shrimp. The side dishes were just as tasty - mac and cheese, coleslaw and potato salad.

"We're having a real Americana 4th of July party," celebrity event planner Mindy Weiss told People. "It's very down home. But it's not a T-shirt and jeans Americana. Because Eric's from Boston, it's more khakis and white shirts. Very Kennedy!"

This will be the second wedding for Simpson, who was married to singer Nick Lachey from 2002 to 2006.

Tags: Jessica Simpson Eric Johnson