Ashlee Simpson Gushes Over Her 'Stunning' Bridesmaid's Dress for Jessica's Wedding

— -- Ashlee Simpson is "really excited about" Jessica Simpson's impending wedding to Eric Johnson, reportedly set for later this summer.

Jessica’s little sister spoke to US Weekly and even revealed some details about her bridesmaid’s dress.

"My dress is really beautiful," she gushed. "It's really, really stunning."

READ: Ashlee Simpson Engaged to Diana Ross’ Son Evan

RELATED: Details of Jessica Simpson's Bachelorette Party With Eric Johnson

Simpson, 29, added that her big sister has great taste, so it's safe to assume Jessica's wedding dress will look gorgeous on the big day.

"I've always borrowed her clothes," she said. "It's fun to go into her wardrobe and do something different because I'm half-tomboy, half-bohemian. It's fun to have her dress me up."

The younger Simpson also has a wedding of her own coming up, as she became engaged to Diana Ross' son Evan in January. From what Simpson told US Weekly, seems like Evan Ross and her son from a previous relationship Bronx, 5, are getting along just fine.

"Bronx loves to boss everyone around on video games," she said. "He's just amazing at it. He's really smart and loves it, so of course Evan and I love to play with him."

As for Jessica, 33, she had her bachelorette party earlier this month on the rooftop of the Eveleigh restaurant in Los Angeles.

"Everyone had so much fun celebrating Jessica and Eric," a source told ABC News. "Dinner was great, there were a bunch of touching toasts and then everyone went dancing.”