Just like her father Joe, Ashlee Simpson couldn't be more thrilled her sister Jessica is engaged to Eric Johnson.

"Everything is so exciting!" she tells E! News of UsMagazine.com's exclusive report.

PHOTOS: Jessica and Eric's most romantic moments

Ashlee, 26, has another reason to celebrate: She and husband Pete Wentz will celebrate their son Bronx's 2-year-old birthday Nov. 20.

Said the proud mom: "It's going to be amazing!"

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