The 26-year-old star - who played Sasha Bezmel on the hit soap - said her beau got down on bended knee on Independence Day.
"Just said yes, FOUR-ever! #happyfourth #brooksfourlyf," Demi wrote captioned an adorable photo of the pair together.
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Andrew also announced the news on social media with the same photo but a different caption.
"One lucky son of a gun..." the U.S. based producer wrote.
Demi and Andrew— who works behind the scenes as an assistant producer on the popular ABC sitcom— went public with their relationship in February 2018.
The couple began dating shortly after Demi split from her Home and Away co-star, Alec Snow who she dated from 2014 until late 2017.
“It's a whole new ball game in terms of acting,” she said. “I have high hopes and it's just a matter of time. It's hard but it's all worth it, and it's exciting because my career can go from nothing to everything very quickly.”
Since confirming her new romance with Andrew, the Australian actress and her fiance have been non-stop posting loved up snaps to their social media accounts.
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