Sage Erin Mellet was born on October 12, 1997 in Johannesburg, South Africa. Her family moved to Australia shortly after she was born due to rising crime in South Africa. Sage currently resides in Los Angeles, California with her older brother and musical artist, Troye Sivan. Sage and her family are Jewish (her father was born to a Jewish family and her mother converted). She has 3 other siblings wich includes Steele (older brother), Troye (older brother), and Tyde (younger brother). In 2016, Sage spent some time in Israel. Sage attended The University of Melbourne from 2017 to 2019 and earned a Bachelor’s degree for Communication and Media Studies. Going with the family tend of using a stage name, Sage often goes by SageyBabey and/or Sage Erin.


Since Sage is singer/songwriter, Troye Sivan’s younger sister, she has grown her own following. She has used her platform to help her career in spreading awareness in causes, foundations and companies she believes in and supports. Sage has often tagged along on tours and other that her brother(s) are involved with to bring behind the scenes content to social media.

In 2015, Sage joined the Australian Amplify Tour as an interviewer and brand representative for Remmel London. Sage partnered with eyewear brands, Frames Etc., Caroline Abram and William Morrison, from late 2016 – early 2017 to promote their products on her social media accounts. In 2017, Sage re-joined Amplify to partner with Proactive and be a reporter for Cool For Summer. Since October of 2019, sage has been a Support worker at Flying Fox in Australia. Flying Fox is a non-profit organization that provides individuals with special needs education opportunities.

In 2017, Sage teamed up with best friend, Alyssa Carp to make her biggest career move and achievement yet. These two women co-founded a monthly feminine hygiene subscription pack. Though the company was founded in 2017, it did not launch its services until August 13, 2019.


Just like her brother Troye, Sage has dabbled in the world of YouTube. From 2012 to 2015, she often appeared in Troye’s videos. By 2017, Sage started her own channel under the name of “Sage Erin”. Unfortunately, that run did not last long. In January 2020, Sage decided to rebrand the channel to her beloved screen name, “SageyBabey”, pick the camera back up and start posting vlogs, daily routines and other videos showcasing her life.