Jessica Simpson is having a "big" wedding.

The 33-year-old star has been planning her special day since her fiancé Eric Johnson popped the question back in November 2010, so she wants lots of people present at the lavish ceremony to witness them tying the knot.

Speaking to USA Today, she explained: "I've been very picky on how I want everything to look and feel.

"Eric's family alone is almost 90 people, so it'll definitely be a big event."

The blonde beauty, who has daughter Maxwell, 2, and ten-month-old son Ace with Johnson, has remained tight-lipped on when their nuptials will take place, but it appears her big day is soon approaching as she's getting ready to send out the wedding invitations to her friends and family.

"We are very close to sending out our invites," she said.

Meanwhile, the singer hasn't released new material since her 'Happy Christmas' album in 2010, so she wants to start focusing on her career again after the wedding.

"We're building a studio in our house," she explained.

"I bought a house from Ozzy Osbourne, so a lot of the studio was already set up. I want to see what comes out. It's time for me to find that out, and I can't wait for my kids to experience that with me. Even Eric. He's never seen me perform onstage."

Jessica was previously married to Nick Lachey, 40, from 2002 until they divorced in 2006.