Jessica Simpson to wed

Jessica Simpson is reportedly engaged to Dallas Cowboys star Tony Romo.

The singer's friends were heard toasting her "happiness" at a party thrown by P. Diddy in Hollywood last Friday (02.05.08).

Jessica, who was out without the American football star, was overheard telling pals, including 'Scrubs' star Zach Braff: "I have never felt better. I am really excited."

According to reports, the 'Dukes of Hazzard' star is determined to beat younger sister Ashlee down the aisle.

A source told America's Star magazine: "Jessica would love nothing more than to get married before Ashlee.

"It upsets her that her little sister will be married and she won't. She gets jealous when Ash gets more attention."

Jessica, who has been dating Tony for six months, even considered proposing to Tony herself.

The source added: "Jessica had been showing Tony rings in magazines. She was telling him what she likes, right in front of his friends, too, so it was really awkward."

Ashlee is engaged to Fall Out Boy rocker Pete Wentz.