Josh Duggar -- I'm Addicted to Porn & Cheated ... 'Biggest Hypocrite Ever'

Josh Duggar says he's the "biggest hypocrite ever" -- fessing up to having a secret addiction to porn ... and admits he's been cheating on his wife while living a "double life."

Duggar issued a statement in the wake of reports that his name was one of the millions exposed in the Ashley Madison hack ... essentially confirming that he used the cheating website to have affairs.

"I have been the biggest hypocrite ever. While espousing faith and family values, I have secretly over the last several years been viewing pornography on the internet and this became a secret addiction and I became unfaithful to my wife."

"I am so ashamed of the double life that I have been living and am grieved for the hurt, pain and disgrace my sin has caused my wife and family, and most of all Jesus and all those who profess faith in Him."

Duggar continued ... "I brought hurt and a reproach to my family, close friends and the fans of our show with my actions that happened when I was 14-15 years old, and now I have re-broken their trust."

"The last few years, while publicly stating I was fighting against immorality in our country, I was hiding my own personal failings."

"I humbly ask for your forgiveness. Please pray for my precious wife Anna and our family during this time."