Katt Williams' year has gone from bad to worse after the embattled comedian was hit with a demand for more than $4 million (£2.5 million) in unpaid taxes.

The funnyman is accused of owing the Internal Revenue Service (Irs) $3.2 million (£2 million) in taxes stemming from 2008, as well as another $829,352 (£518,340) from the following year (09).

Irs officials previously filed a tax lien against Williams in 2010 for a debt of $284,000 (£177,500), according to Tmz.com.

The tax trouble is the latest blow for Williams - he has been arrested on several occasions in recent months over allegations including harassment, assault and reckless driving.