The Australian stars have both had major breakout roles in the past few years, and they're actually sisters who grew up together in Perth before heading to Hollywood. 

Both sisters hit the big time by starring in a breakout teen/young-adult drama: Katherine was the original protagonist of the Netflix drama "13 Reasons Why," and Josephine stars in the romantic-drama movie franchise After. 

Despite being in the same industry, the sisters apparently try to keep their professional lives out of their personal relationship. 

Fill in soaIn an April 2019 interview with W magazine, Josephine said, "Everyone asks me [if we advise each other at home], and honestly the answer is no. Not to sound arrogant, but we both sort of know what we're doing." me text

Of course, since they are sisters in the public eye and tend to keep their professional lives separate, there's been plenty of curiosity about the nature of their relationship, with tabloids speculating about a "feud" between them. 

"I just don't understand the internet sometimes. I think that rumors are crazy," Josephine told Refinery29. 

"I think when you have limited content of someone, and I'm definitely not helping that, you just sort of take little parts of what you know about a person, and you extrapolate it . . . 

We both got into acting on our own, completely separately, with nothing to do with the other one. 

We both grew up in this family, with parents that weren't particularly creative, and were both interested in creative things."