The widower of tragic actress Lisa Robin Kelly has filed a wrongful death lawsuit against bosses at California rehab centre Pax House.

The That '70s Show star, who had a history of addiction issues, died on 15 August, 2013, three days after she was admitted to the Altadena alcohol treatment facility. Coroners ruled her passing an accident, revealing the 43 year old had suffered from a multiple drug intoxication.

Her husband Robert Gilliam has now accused the rehab centre staff of incompetence, claiming the actress lay dead in her room for several hours before she was discovered, according to Tmz.com.

He is now seeking compensation for loss of love, affection, comfort and financial support.