She shares the baby joy with wife Lisa Gerrard, whom she married in an intimate ceremony in December last year, after their ceremony was initially delayed due to Covid-19.
At the time, the opera star tweeted a snap of her with her new wife on their wedding day captioned, "I married the love of my life, my best friend, my everything. My beautiful wife."
Marvelly is a well-known public figure, initially beginning her career as a classical singer before crossing over to more mainstream pop music. Marvelly is also a former columnist for the Weekend Herald. Marvelly was appointed as director for Rotorua Museum Te Whare Taonga o Te Arawa in July 2020.
Marvelly came out as bisexual in May 2018 after being nominated for an LGBTI award.