Weddings of Their Dreams

By Liza Hamm, Lesley Messer

UPDATED 03/01/2010 at 01:00 AM EST • Originally published 03/01/2010 at 01:00 AM EST

Planning a wedding can be stressful, no matter how fabulous or famous the couple. "I just want to show up and have a good time!" the recently betrothed Carrie Underwood told PEOPLE about her big day. No worries, Carrie! Three top bridal experts were happy to imagine the perfect weddings for Hollywood's hottest couples, whether the lovebirds have already set a date—or are miles away from an altar. Randy Fenoli, fashion director at New York City's Kleinfeld bridal store and star of TLC's Say Yes to the Dress, suggested dream dresses; jeweler-to-the-stars Neil Lane designed the perfect rings; and the host of WE's My Fair Wedding, David Tutera, created receptions that are ready to go. We expect to get our invitations soon.

Engaged!

Russell Brand & Katy Perry

WHY NOT GO RETRO?

The pop singer would shine in Monique Lhuillier's silk-satin organza gown. "It's perfect," says Fenoli. "It's got that retro look with a modern chic."

SHE'LL HEART THIS RING

Since she's reportedly changed rings once already, should Perry want to switch again, Lane suggests Brand spring for this 10-carat heart-shaped diamond. "It suits her. She's a little girly and likes detail."

CLOWNING AROUND

"Nothing about them is traditional," says Tutera, who'd throw the couple a circus-style reception—with acrobats and fire-breathers for entertainment and a teetering, mad-hatter-style cake.

Engaged!

Carrie Underwood & Mike Fisher

FUN WITH FLOWERS!

Given Underwood's sweet demeanor, Fenoli suggests Monique Lhuillier's rose-embroidered frock: "It's feminine and romantic. It would be great!"

WITH THIS RING ...

Sure, she's already rocking a yellow Johnathon Arndt sparkler, but Lane has designed an 8-carat eternity wedding band to match. "It makes a statement," he says.

DOWN ON THE FARM

With a nod to the bride's Oklahoma roots, Tutera would transform a barn into a ballroom filled with lilies, roses and candelabra for a "country-glam wedding."

Any Day Now ...

Kim Kardashian & Reggie Bush

WARNING! CURVES AHEAD!

Fenoli selected a body-hugging Pnina Tornai gown because "I wanted her in something flashy and fun."

A RING TO RIVAL REGGIE'S

With Bush now sporting a Super Bowl ring, Lane suggests a 20-carat Asscher-cut stone to beat that bling: "It's bold and sexy, like her."

SOMETHING OLD ...

"It should feel like a supper club," says Tutera of his suggested white-tie soiree. Surrounded by candles and calla lilies, guests would dance to the music of a 20-piece band.

Maybe Someday ...

Renée Zellweger & Bradley Cooper

TRIED AND TRUE

If Zellweger says "I do" again, she'll likely opt for favorite Carolina Herrera; Fenoli chose an "elegant, chic" gown by the designer.

PUT A RING ON IT!

Lane suggests that if the commitment-shy Cooper pops the question, he should go with something timeless, like this 5-carat bauble. "It's feminine and classic," says Lane, "and she's a classic beauty."

WHAT WEDDING?

For this casual couple, Tutera suggests a laid-back gathering of friends with a "sexy lounge vibe," by the rooftop pool of the Gansevoort hotel in South Beach.

Engaged!

Kristen Bell & Dax Shepard

ALL DRESSED UP

Fenoli sees the petite When in Rome star in an Amsale design. "Simple and elegant," he says. "Very Grace Kelly."

THE RING, FOR REAL

Shepard actually proposed with this 3-carat fancy-colored diamond, designed by Lane: "It's a classic cut but an unusual diamond. They're fashion-forward people."

BEACH CHIC

Since Bell and Shepard are often spotted on tropical vacations, Tutera suggests nuptials at an old Hawaiian sugar mill, with flowers in a golden hue inspired by Bell's ring. Guests would enjoy music from a steel-drum band.