Brendan Fitzpatrick and Morgan Stewart got engaged during filming on Rich Kids of Beverly Hills season 3, and soon, fans will watch it all go down.

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In a sneak peek at an upcoming episode of the E! reality series, Fitzpatrick is seen visiting Beverly Hills jewelry store Jean Dousset Diamonds.

"I'm going to propose to my long time girlfriend," Fitzpatrick announces in a clip from the show, via an E! News report on Sunday. "We've been dating for two and a half years and I really knew that this was something special after probably six months and I can't imagine my life without her."

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"Morgan isn't even comparable to any other girl I've dated, because she's so smart," Fitzpatrick explained during his confessional. "She's so beautiful...I have to throw skinny in there, just to defend myself later...and I can't wait to have her by my side for the rest of my life. That's why I'm going to ask her to marry me."

During his visit with Dousset, who is the great, great grandson of Cartier, Fitzpatrick explains that he's looking for a ring that is about four-and-a-half carats, which Dousset estimates will cost him anywhere from $100,000-500,000.

"This ring will definitely cost more than my car," Fitzpatrick said, joking, "In fact, if anybody wants to buy a Range Rover Supercharged, just let me know."

Rich Kids Of Beverly Hills season 3 airs on Sundays at 10 p.m. on E!