McGrath won over audiences around the nation in multiple roles in popular Australian TV shows like Prisoner, A Country Practice and most recently Channel 7's medical drama All Saints.
While it McGrath's cause of death is still unknown, her death was first reported by The Sydney Morning Herald.
Several Australian industry greats have taken to Twitter to pay tribute to the star.
Fellow All Saints actress Georgie Parker has taken to Instagram to share an emotional tribute to the star.
"I learnt so much from this talented, witty person. No bull💩 allowed with this woman," she wrote alongside a snap of the actress.
"Didn’t get tell to you how much you meant to me, but you would have told me to shut up anyway. When I signed off in an email I’d say “love me” and you’d say “I do”. Well I love YOU ❤️Jude . And all of us at All Saints were so very lucky to have worked alongside you. Can’t believe it actually . 💙💜💙💜🌈."
Fans have also expressed their condolences on Twitter.
Fremantle Media's head of drama Jo Porter, who worked alongside McGrath as an executive producer during All Saints, spoke to SMH and described her as "one of those incredible character actors who stole hearts and scenes, perhaps never really getting the true accolades she deserved."
"Judith was adored by her colleagues and by the public, though she would too modest to admit that," Porter added.
Sending love to the family of the veteran actress during this difficult time.