Leave it to a rich kid to have the most perfect dress on her wedding day!

On Sunday night’s all-new Rich Kids of Beverly Hills, Morgan Stewart visits the Badgley Mischka shop in Beverly Hills with her mom to find “the one.”

“You always imagine yourself in a wedding dress as a kid, but you don't actually imagine the feelings that you're really going to feel,” she says in a sneak peek.

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The 27-year-old — who’s set to marry longtime love Brendan Fitzpatrick — tries on an array of dresses, many of which are fit for a princess. And, naturally, mom sheds a tear every single time she sees her daughter try on a new gown.

“Being in a wedding dress for the first-time ever and seeing my mom get emotional, really kind of makes me realize how life-changing this is,” Morgan continues.

The Boobs and Loubs blogger got engaged to Brendan earlier this year. He popped the question at very romantic San Ysidro Ranch in Montecito, Calif., with a 4.01-carat diamond ring (not too shabby, right?).

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So how is the 26-year-old real estate mogul going to react when he sees her all dolled up on the big day? She says, “Brendan is going to flip out. He's going to pass out, he's gonna need the inhaler.”

Check out a clip below — and scroll through to see even more stars’ engagement rings!