"I don't think my story is over yet", she told Vanity Fair over the summer, when she first indicated that she wanted to come back in January.
The 23-time Grand Slam champion became a mum for the first time when giving birth to daughter Alexis Olympia, having incredibly won in Melbourne while eight-weeks pregnant.
The two of them, along with the three-time Grand Slam victor Stan Wawrinka and 14th ranked Kei Nishikori, will return to action in Melbourne as tournament director Craig Tiley confirmed the news.
Venus is in career-best form, achieving her highest ranking since January 2011 after she finished runner-up to Serena at both Wimbledon and the Australian Open. "It will be up to her as far as where she is with her fitness".
Despite Williams' past assertions, however, she's been mum lately about her intentions with tennis, preferring instead to share more parental-oriented tidbits.
Speaking about the 36-year-old at a press conference confirming an increase in prize money for players taking part in the tournament, Tiley said Williams would be ready to play Down Under, per the Associated Press (h/t ESPN).
In the men's field, Tiley confirmed six-time victor Novak Djokovic and fellow former world No. 1 Andy Murray, who have both had injuries this year, would play in Melbourne 2018 along with Roger Federer and Rafael Nadal, who contested a classic final last January.
Australia's charge in the men's draw will be led by world No.21 Nick Kyrgios but Tiley couldn't guarantee that Bernard Tomic would get a start.
Tiley said the winners' prizemoney had broken a barrier.
"There's still quite a bit of tennis to be played before the end of the year so that's (a wildcard) is a bridge we'll cross when we come to it".
"We're proud of the fact she's gone around the world, she's told that her baby's AO - Australian Open, Alexis Ohanian", Tiley added.