Shocking new court documents report that actor Dennis Hopper is too frail to undergo chemotherapy for prostate cancer and that the ongoing -- and increasingly nasty -- divorce battle with his wife Victoria has drained his savings.

His attorney, Joseph Mannis, states in the filing -- obtained by TMZ -- that because Hopper is so terminally ill, he is unable to defend himself in divorce proceedings. "It is doubtful that Mr. Hopper will ever recover sufficiently to be subject to a deposition," one of the actor's doctors declared.