It comes after Justice Robert Allan Hulme described Kelsall's killing of Mr Huxley in September 2013 as the work of a "very disturbed mind". The 22-year-old first spotted Mr Huxley at the Oaks Hotel in Neutral Bay and then followed him from the pub to his nearby unit.
When he realised the door was left open - as was Mr Huxley's habit - Kelsall went inside and attacked the 31-year-old as he lay either asleep or incapacitated by alcohol.
He indecently assaulted him before plunging a knife into him more than 20 times.
Describing it as a "chilling case of murder", Justice Hulme said at the time, "whether the offender killed for the thrill of it ... or whether it was as a result of fantasy or obsession I am unable to say. It was entirely senseless and needless".
Kelsall's parents, who had sat in the gallery during his murder trial, were not in court for his sentencing today.