Husband killer Helen Milner will appeal against her conviction to New Zealand's highest court, APNZ has learned.
Milner, dubbed the 'Black Widow', was found guilty by a High Court jury last December of fatally poisoning her second husband Phil Nisbet by lacing his evening meal with crushed sedatives.
In February she was sentenced to life in prison with a minimum non-parole period of 17 years.
Milner, 50, appealed against her convictions for murder and earlier attempting to murder truck driver Mr Nisbet.
Court of Appeal judges rejected her argument that Mr Nisbet, 47, had committed suicide.