Don't be surprised to find Ashlee Simpson and Pete Wentz grinning Cheshire cats -- they're newlyweds.

The pop-star little sis of Jessica Simpson and the Fall Out Boy bassist tied the knot Saturday night at her parents' Los Angeles-area home with an "Alice in Wonderland" theme, according to People magazine.

Simpson, 23, and Wentz, 28, exchanged vows at the property in Encino, a bedroom community in the San Fernando Valley. Joe Simpson, her father, performed the non-denominational ceremony and sister Jessica was the maid of honor, the magazine said.

Sources also say Jess DID bring Tony Romo as her date!

About 150 guests attended. Simpson's dad, Joe, performed the non-denominational ceremony, her sister Jessica served as maid of honor, and Wentz's English bulldog, Hemingway, was the ring-bearer.

The reception was an "Alice in Wonderland" theme, and the wedding cake had a top hat, tea pot, stop watch and a pot of flowers on top.

People also reported Saturday that the couple is expecting a child together, which both Simpson and Wentz have long denied.

Rumors began to fly midweek that the wedding was on, and things got curiouser from there.

Simpson and Wentz began dating in fall 2006 and announced their engagement April 9.

"What the H?!?" Editorial: This wedding was the worse kept secret ever! Now if she'll just admit she's pregnant, everything will be out in the open. How long do you think this union's gonna last? 1 year? Two? I do, however, love that Pete's dog was the ring bearer. I plan to have my dachshund be my ring bearer too! Seriously! I'm glad Jess brought cutie Romo as her date. Maybe they are back together. Who knows? All I know is Tony better be ready for football season because I want the Cowboys to go to the Super Bowl this year!

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