The 35-year-old actress and 31-year-old singer have been publicly dating since May 2020.
The A-list couple met during the production of Midnight in the Switchgrass, in which Fox stars Rebecca Lombardi and MGK features as Calvin.
Sharing the news on Instagram, Fox posted a video of MGK getting down on one knee to propose beneath a banyan tree.
“In July of 2020 we sat under this banyan tree,” she wrote. “We asked for magic. we were oblivious to the pain we would face together in such a short, frenetic period of time. Unaware of the work and sacrifices the relationship would require from us but intoxicated off of the love. And the karma.”
“Somehow a year and a half later, having walked through hell together, and having laughed more than I ever imagined possible, he asked me to marry him. And just as in every lifetime before this one, and as in every lifetime that will follow it, I said yes….and then we drank each other’s blood. 1.11.22.”
Taking to his own Instagram, MGK shared a video of Fox’s stunning new diamond and emerald engagement ring.
“Yes, in this life and every life,” he wrote. “Beneath the same branches we fell in love under, I brought her back to ask her to marry me. I know tradition is one ring, but I designed it with Stephen Webster to be two.”
“The emerald (her birth stone) and the diamond (my birth stone) set on two magnetic bands of thorns that draw together as two halves of the same soul forming the obscure heart that is our love. 1.11.2022.”