The pair – who got together in July 2019 – were filming the final scene of their new movie, Time Is Up, when Benjamin, 25, decided to surprise his girlfriend by getting down on one knee.
And Bella, 23, seemed delighted with the stunning diamond ring, showing off her new rock and locking lips with Ben as he shared the news online.
‘Thank you for being amazing baby. I love you so much. Yayyy we’re getting married. Celebration in Italy and America both,’ he said on camera, with the newly-engaged actress trying to duck around to give him a kiss.
She responded: ‘Yessss. I love you so much. Now give me a kiss.’
Speaking on Instagram Stories, Benjamin later explained how he proposed, and wrote: ‘I wrote the love letter on the back of the script of our movie… at the end of the last scene, she was at monitor watching with the director and… surprise.’
While he didn’t divulge what was in the letter, he did post the last page of the script to keep fans guessing.
The only noticeable comment was the words Love You at the bottom of the note.
Bella and Ben have been inseparable since mid-2019 when they first got together, and have been filming Time Is Up in Madrid, Spain over the past few weeks, sharing loved up snaps together.
Bella identifies as pansexual, previously telling Good Morning America: ‘You like what you like. Doesn’t have to be a girl, or a guy, or.. you know, a he, a she, a this or that. It’s literally, you like personality, you just like a being.’
She has previously been in relationships with Mod Sun, and Tana Mongeau.
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