Former NRL star Chad Robinson found dead in a car at the bottom of a cliff.

Three weeks after going missing from his Sydney home, it has been confirmed that NRL star Chad Robinson has died.

The 36-year-old’s body was discovered inside the wreckage of his silver Suburu Outback at the bottom of a gorge in Kenthurst on Thursday by electricity workers operating within the area.

The father-of-tw0, who previously played for the Parramatta Eels and Sydney Roosters, was first announced missing on November 26 after he left his Kellyville house without his wallet or phone, wearing only shorts and a t-shirt.

Now, weeks of extensive searching have come to an end.

While the body is yet to be formally identified, Robinson's family confirmed the discovery on Thursday evening via a statement on the 'Let's Find Chad' Facebook page that read, "It's with a heavy heavy heart that we can confirm that Chad's body has been found this afternoon. There are no words for our whole families loss and especially his two beautiful kids. Thank you everyone one of you for your support the last few week [sic]. Brother you were the world to all of us, I can't imagine life without you, but you are free, fly high my beautiful brother."

At the time of the disappearance, Robinson's younger brother Tim, who currently plays for the Cronulla Sharks said the behaviour was completely out of character.

NSW Police say at this stage there are no suspicious circumstances surrounding Robinson's death, however, a post-mortem examination will determine the cause of death.

Between 2000 to 2008, Robinson played 159 rugby league matches with the Eels and Rosters, with six seasons for the Eels and three for the Roosters.

He competed in the 2003 and 2004 NRL Grand Finals.

At the time of his death, Robinson was working as an asset finance broker in Sydney.

If you are experiencing mental health issues contact Lifeline on 13 11 14 or Beyond Blue 1300 224 636