The couple returned to the house, where Sorrentino played a slideshow for Pesce before getting down on one knee.
"You're my best friend, my college sweetheart, my better half. You make me a better person. Please make me the happiest man on earth. Will you please marry me?" he said.
Pesce said on Twitter that Sorrentino and his co-stars pulled off her "dream proposal."
"My dream ring, dream man & dream proposal! Couldn't have asked for anything more! Thank you my love @ItsTheSituation and to your amazing friends that went above & beyond for us in Miami! We are SO Blessed!" #JSFamilyVacation," she wrote.
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Sorrentino and his co-stars came to fame on the MTV series "Jersey Shore," which ended in 2012 after a six-season run.
The cast returned for "Jersey Shore: Family Vacation," which will air its Season 1 finale June 28.
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