The practice courts have been buzzing with top WTA players, including Venus Williams.
Venus Williams is a former finalist here, finishing runner-up to Serena Williams in 2003.
Victoria Azarenka, who won her first Grand Slam title here a year ago, hit the courts.
With her mother looking on, five-time Australian Open champion Serena Williams had a hit.
Li Na during a practice session with coach Carlos Rodriguez, of Justine Henin fame.
Victoria Azarenka and Novak Djokovic at the draw ceremony - they have a lot in common.
Novak Djokovic and Victoria Azarenka are both World No.1s and defending champions here.
Serena Williams debuted her Nike Training Club workout app to 60 fans in Melbourne.
Former Aussie Open quarterfinalist Lucie Safarova with a kangaroo at the player party.
There was also a big snake at the Aussie Open player party, and it met Arina Rodionova.
A record crowd turned out for Kids Tennis Day at Melbourne Park on Saturday afternoon.
WTA stars Serena Williams, Ana Ivanovic and Victoria Azarenka were all at the event.
Also there were SpongeBob Squarepants, Patrick Starfish, Dora the Explorer and Diego.
Novak Djokovic was one of the ATP stars there, with Roger Federer and Jo-Wilfried Tsonga.
Kids Tennis Day at the Aussie Open was proudly supported by Nickelodeon and Medibank.