Duggar also described his "secret addiction" to porn.
Josh Duggar has admitted to cheating on his wife, Anna, one day after news broke that the 19 Kids and Counting star had a paid Ashley Madison account.
In a statement posted to the Duggar family's website, Duggar wrote:
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.
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 rebroken their trust.
The last few years, while publicly stating I was fighting against immorality in our country, I was hiding my own personal failings.
As I am learning the hard way, we have the freedom to choose to our actions, but we do not get to choose our consequences. I deeply regret all the hurt I have caused so many by being such a bad example.
I humbly ask for your forgiveness. Please pray for my precious wife, Anna, and our family during this time.
The admission comes one month after TLC canceled the Duggar family's reality show in the wake of a child-molestation scandal involving Duggar. Duggar has been accused of molesting multiple underage girls while he was a teenager.
Duggar resigned from his role at the Family Research Council in the wake of the molestation scandal. The organization fought against gay marriage and says its mission is "to champion marriage and family as the foundation of civilization."
Duggar married Anna in 2008. They have four children together.