Following the January 2018 creation of US Time's Up campaign by a collective of Hollywood female artists to fight workplace sexual harassment and assault, Arena joined with more than 30 high-profile women from the Australian media and entertainment industries – including Deborah Mailman, Sarah Blasko and Danielle Cormack – to spearhead a new national organisation, "NOW Australia", led by broadcaster Tracey Spicer, to tackle sexual harassment, abuse and assault in workplaces across Australia. On Twitter, the Australian #MeToo campaign has encouraged stories of workplace harassment and assault following her public call-out on Twitter in October 2017.