It looks like parents-to-be Ashlee Simpson & Pete Wentz, and Jessica Alba & Cash Warren all decided to get hitched!

Ashlee Simpson & Pete Wentz' Weekend Wedding

Photo: PR Photos

Ashlee Simpson & Pete Wentz married in a private ceremony this past Saturday evening. "We're delighted to confirm that Pete Wentz and Ashlee Simpson were married this evening in front of family and close friends," said their spokesperson.

According to People.com, the bride wore an ivory lace wedding gown by Monique Lhuillier and jewels by William Noble. The couple said "I do" in front of 150 guests at Ashlee's parents' home in Los Angeles. Ashlee's dad Joe Simpson performed the ceremony and big sister Jessica stood in as Maid of Honor. The wedding was a dream come true for Simpson, complete with an Alice in Wonderland themed reception. The first wedding photos can be seen on People.com.

The happy couple is expecting their first child together and have only been engaged for a month.

Jessica Alba & Cash Warren Tie the Knot

Photo: WireImage

People.com is confirming that Jessica Alba and Cash Warren quietly married on Monday around noon. According to a source, they were married in the Beverly Hills courthouse's ceremony room. Alba wore a long blue dress with her hair casually pulled back into a ponytail, while Warren sported a white shirt and brown pants. Reports say that no one but the couple attended the ceremony.

Alba is set to give birth to the couple's first child this summer and the two have been engaged since last December. Many are speculating that the couple chose to get married on Monday knowing that much of the attention would be on Ashlee Simpson and her weekend nuptials.  Alba may have also known that the tabloids would be busy and unsuspecting, as they work to complete their issues and get them to print each Monday. Smart thinking Jessica!