Jim Carrey's lawyer insists Cathriona White "stole" prescription drugs from the actor.

He said in a statement: "Jim never supplied his prescription medications to Ms. White. Ms. White stole his prescription medications from him.

"Significantly, my client's prescriptions were legally obtained medications that were prescribed to him by his doctor in accordance with routine practices that are used all the time, and which are regularly used by SAG members and others with the knowledge of their doctors and insurers, to protect the privacy of well-known individuals."

Burton's lawsuit claims Jim used his "immense wealth and celebrity status to illegally obtain and distribute highly addictive" drugs under a false name of Arthur King and supplied them to Cathriona.

Marty has slammed the lawsuit as an "abhorrent money-grab scheme", insisting Burton is attempting to "cash in" on Cathriona's death.

He added: "It is despicable that Burton, who claims to have been Ms. White's husband but never lived with her and did not even reside in the same state she did, now comes forward trying to cash in on her death.

"We are confident that the court will see through this abhorrent money-grab scheme."

What's more, sources close to Burton have told gossip website TMZ that his legal team believe there are "serious questions relating to the conduct of Carrey's physician".

Burton's team are said to be considering reporting Carrey's doctor to the Medical Board of California.

Jim has also hit out at Burton as "heartless" for filing the Los Angeles County Superior Court documents, claiming it is an attempt to "exploit" him and "profit" from Cathriona's demise.

He said in a statement: "What a shame. It would be easy for me to get back in a room with this man's lawyer and make this go away, but there are moments in life when you have to stand up and defend your honour against the evil in this world. I will not tolerate this heartless attempt to exploit me or the woman I loved.

"Cat's troubles were born long before I met her and sadly her tragic end was beyond anyone's control. I really hope someday soon people will stop trying to profit from this and let her rest in peace."

Mark is seeking funds to cover funeral costs and other damages from the lawsuit.