Dennis Hopper is too ill to fight his divorce.

The 73-year-old actor - who was diagnosed with advanced prostate cancer in October 2009 - is currently divorcing his fifth wife Victoria Duffy, and court papers filed by his lawyer Joe Mannis from his doctor claim he is unlikely to make a recovery.

He stated: "It is doubtful that Mr. Hopper will ever recover sufficiently to be subjected to a deposition."

The star is also believed to weigh just over 100 pounds as a result of his ongoing treatment.

Hopper has offered his estranged wife - who he married in 1996 - $5,000-a-month in spousal support and claims it is all he can afford as he has been unable to work and his liquid assets only total $300,280.

However, Victoria insists the 'Easy Rider' star has much more in his bank account thanks to artwork he has made and sold.

Defending the case, Hopper claims in legal documents he has sold $1,895,000 worth of art in the last nine years, but spent $1,850,000 on creating and storing it, leaving him with a minor profit of $45,000.

Victoria recently accused the actor of trying to engineer their separation so she would not receive anything from his will.

Court documents filed at the Los Angeles Superior Court earlier this month said: "I believe in contemplation of death that Dennis Hopper may be intending to remove me as a beneficiary of any kind."