Jay Leno has filed to be conservator of his wifes estate, citing her diminished capacity due to dementia.

Court documents reviewed by HuffPost state that his wife, Mavis Leno, has been progressively losing capacity and orientation to space and time for several years and is not capable of executing her own estate. The two have been married for 43 years.

The retired late-night host is asking courts to issue a substituted judgment to allow him to approve his wifes estate planning and execute a testamentary plan, which is a type of trust created after the grantors death.

A substituted judgment is often used when a patient lacks decision-making capacity and has no advance directive.

The court documents state that Jay Leno is petitioning the courts to ensure his wifes desires concerning the disposition of her assets upon her death are realized.