Sharing a photograph of herself and Goldblum embracing, the actress and aerialist wrote on Twitter on Saturday, "Jul 8 he proposed @ our fave #okstore. I was taken over by tears of joy n ecstasy! We picked the ring 2gether #inlove"
The actor, 61, then flew his wife-to-be to Maui for a romantic vacation, where she showed off her new ring while watching the sun rise over Haleakala, a dormant volcano that's 10,000 feet high.
"So in love!!!" Livingston, 31, captioned a photo taken at Mama's Fish House restaurant, and she posted another cuddly pic at Spago at the Four Seasons Resort before sharing a close-up of her new ring.
Goldblum has been married twice before, to actresses Patricia Gaul and Geena Davis.