The 35-year-old discovered she was expecting shortly before the 2017 Australian Open in January but went on to win the tournament without dropping a set, beating her sister Venus in the Melbourne final 6-4 6-4.
"I've been in contact with all the top players and am pleased to announce we'll have the full top 100 men and women returning to the Australian Open", Tiley said.
Including her seven Australian Open titles, Williams has won a total of 23 Grand Slam singles titles, more than anyone else in the Open-era and one shy to tie the record held by Australian Margaret Court, who coincidentally, won three of her titles after returning from giving birth to a son in 1973.
The 2018 Australian Open will take place from 15 to 28 January.
Serena Williams and partner Alexis Ohanian attend a gala event before the birth of her daughter in May.
The 2018 Australian Open has been officially launched with the world's top tennis players committed to playing in the tournament.
Another star who is expected to return to action, though there is no confirmation, is 2017 Australian Open champion Serena Williams as he she prepares for her comeback.
In the 2018 edition of the tournament, the prize money pool has increased by 10% to AU$55million (£32.4m).
Tiley said Williams was back in training to defend her title.
The women's trophy will be presented by United States great Billie Jean King, 50 years after she won her first Australian Open title.
Tiley also announced that former World No. 1 Andy Murray will compete at Melbourne Park in the tournament, which spans from January 15-28.
Murray has been sidelined since July with a hip injury.
The pair could be joined by Novak Djokovic and Stan Wawrinka, says Tiley.
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.
Contrarily, last week diplomats accused the United States of putting in place sanctions which could "destroy modern civilization". According to estimates, North Korea exports about $ 3 billion annually, the sanctions may trim $ 1 billion from this trade.
To access something you've already saved, you have to navigate away from the main feed and open a section called Bookmarks. They can also go through the slightly cumbersome task of direct messaging or emailing a tweet to themselves.
Mane was substituted in the 89th minute of Senegal's win, and Liverpool have now confirmed the player's injury. The injury was picked up during that same fixture and could keep him out of action for six weeks.
South Korean warships including the nation's first Aegis destroyer, Sejongdaewang (L), in this file photo. US President Donald Trump later dismissed any prospect of talks with North Korea as a waste of time.
Nissan Motor and Mitsubishi are also top customers of Kobe Steel and said they are checking whether their vehicles are affected. These metals went into products at about 200 companies, including Toyota, Mazda , Subaru , Boeing and Central Japan Railway.
Of 79 laureates so far, more than a third have been affiliated with the university's school of economics. Richard Thaler works as a professor of Behavioral Science and Economics at the University of Chicago.
International Monetary Fund boosted the global GDP growth forecast for the current calendar year 2017 by 10 basis points to 3.6%. The Fund had already cut its 2017 forecast by 0.3 percentage points in July from April and left its latest forecast unchanged.
Every update in software is built with the latest hardware in mind, and it may be that this slows down an older phone. That resulted in several bouts of battery drain issues, but it also slowed down the performance of the app.
When one white supremacist attempted to hit 20-year-old DeAndre # Harris with a flagpole, Harris swung a flashlight back at them. Harris's accuser has opted to remain anonymous but has been described as a member of the white supremacist group.
D'backs look to former Dodger
Logan Forsythe and Austin Barnes had the key hits in that pivotal fifth inning, and Puig followed up to drive in two more runs. The Dodgers lead 2-0 and can eliminate the Diamondbacks when the National League Division Series moves to Phoenix on Monday.
Socceroos 2 Syria 1
Australia will now face one of Honduras, Panama or the United States to confirm their place in Russian Federation next summer. The midfielder, who plays for the Dhofar Club in Oman, spotted Omar Al Somah's run and threaded a through ball into his path.