It appears the Jackson family isn't letting AEG Live get off easy.

According to TMZ, Michael Jackson's children Prince, Paris and Blanket, along with their grandmother Katherine Jackson, are requesting $40 billion from the entertainment company for the death of their father in 2009.

The family is suing AEG Live -- who sponsored Michael's "This Is It" tour -- for its alleged negligent hiring and supervision of Dr. Conrad Murray, who was convicted of involuntary manslaughter in the king of pop's death.

The kids reportedly want $10 billion for all of the future earnings they claim their dad would have made had he lived, as well as an additional $50 million for various other damages. Still, AEG Live says the Jacksons' billion dollar demand is ridiculous considering Michael's career was in a state of decline after his child molestation allegations. The concert promoter also says their monetary request is based off of rank speculation.

The civil case begins in Los Angeles on April 2.