The 22-year-old is an actor, activist, and model.
Brown and Hemsworth were seen on what appeared to be a date in New York's West Village on Thursday, with the two pictured holding hands and later dining al fresco at a local eatery.
Hemsworth's outing comes after Cyrus' very public flings with Kaitlynn Carter and current paramour Cody Simpson.
Here's 5 things your should know about Maddison Brown:
She's An Actress and Model
Brown currently stars in CW's reboot of "Dynasty" as Kirby Anders, but she's hardly new to the acting scene, having starred alongside some of the biggest names in Hollywood, most notably as Nicole Kidman's daughter in "Strangerland" (2015). Brown has also achieved a fair bit of success Down Under, playing the younger version of Elizabeth Debicki’s character in the Australian show "The Kettering Incident".
She moved from her native Sydney to New York City at just 16 and has been modeling since she was 13.
She's Not Into Partying
In an interview with i-D magazine in 2014, Brown disclosed that she isn't exactly the type to party, unlike most people her age.
"Sometimes, I feel like I have trouble connecting with people my own age because I've been working for so long," she told the publication. "But then I have trouble connecting to people in their late 20s and 30s because I feel like there is such a big age gap. I don't know. It's about finding the right people I guess."
She Once Said She Wanted to Hook Up With All Three Hemsworth Bros
Brown was asked to play "F–, Marry, Kill" on the Zach Sang Show, choosing between the Hemsworth brothers, Margot Robbie and Hugh Jackman. Her answer?
Kill Hugh Jackman, marry Margot Robbie "because I would like to f– her for life," and f--k all three Hemsworth brothers. Can't really fault her on that one!
She's a Bit of a Photographer
Brown's Instagram isn't all her-- she's also posted her share of artsy landscape shots, and shares everything from her sheet mask selfies to her subway escapades on there too.
She's a Climate Change Activist
Her Instagram highlights include tips on how to help the Amazon rainforest that's been on fire since August, as well as a series of dolphin videos-- a perfect match for Liam Hemsworth, who agreed not to have children with Cyrus while the earth faced a climate crisis.