Osbourne previously appeared on both The X Factor (UK) and America’s Got Talent.
Nine is not confirming any names, but has previously told TV Tonight it may settle on 1 or 2 international names amongst its 3 judges.
Others said to be under consideration are Lily Allen, Victoria Beckham and Aussie Sophie Monk.
The outspoken Osbourne, frequently at odds with former AGT judge Dannii Minogue, currently appears on CBS chat show The Talk which has aired in Australia on TEN. Its US seasons begin in September suggesting that any Australian commitments would need to wrap before then.
Auditions for the show begin in March meaning a host announcement will be likely soon.