In an emotional victim's statement Michelle Knight has told her captor of 11 years Ariel Castro that she, "will overcome all this that happened."
Ms Knight was the only one of the women kidnapped by Castro who spoke for herself, the other women were represented by family or lawyers.
Ariel Castro has spoken to the court ahead of his sentencing for 937 charges related to the kidnap of three women for over a decade in his home.
Castro told the court:
"I stated before that I was a victim of sex when I was a child. This led me into viewing pornography for my whole life...These people are trying to paint me as a monster and I'm not a monster, I'm sick. My sexual problems have been so bad on my mind, I'm impulsive."
"I believe I am a victim to porn."
Michelle Knight was the only one of Ariel Castro's victims to speak herself in court, she said: "Days never got shorter, days turned in to nights, nights turned in to days. The years turned in to eternity.
"Nobody should ever have to go through what I went through.
Through tears she told Castro: "I spent 11 years in hell, now your hell is just beginning. I will overcome all this that happened, but you will face hell for eternity."
One of Ariel Castro victim's was seen in court seen embracing a member of the prosecution team ahead of his sentencing.
Michelle Knight was held captive for 11 years by the former school bus driver, who abducted and sexually abused her.
Castro was sitting at the front of the courtroom when Knight arrived. Ms Knight is expected to give a victim statement in court shortly. Castro is expected to be sentenced to life in prison.
The court will be shown a 3D model of Ariel Castro's home in Cleveland, Ohio where he imprisoned and abused three women for a decade as part of today's hearing.
Ariel Castro has entered the courtroom in the US state of Ohio where he is due to be sentenced for 937 charges including rape and aggravated murder.
Dressed in orange prison garb and ankle chains, Catro has mainly been giving one-word answers to the judge's questions.
Ariel Castro will speak during today's sentencing, according to local TV station WKYC.
At least one of his captives - most likely Michelle Knight - will also speak during the hearing.
One of the women who was imprisoned for years in the Cleveland home of Ariel Castro has written to local police officers thanking them for their work.
NBC News displayed a copy of the letter from Michelle Knight in which she writes that "life is tough, but I'm tougher".
Cleveland police posted the handwritten note on their Facebook page, but it has since been removed.
Two of the Cleveland kidnap victims detailed years of incarceration and abuse in personal diaries, a prosecutor has revealed.
In a sentencing memo file submitted last night, prosecutor Timothy McGinty said the diaries speak of "forced sexual conduct, of being locked in a dark room ... [and] of the dreams of someday escaping and being reunited with family".
Ariel Castro, who has pleaded guilty to 937 charges including rape and aggravated murder, is due to be sentence later today.
The Ohio prosecutor has announced a 977-count indictment against a man charged with holding three women captive and abusing them in his home in Cleveland, Ohio, for around a decade, according to the Reuters news agency.
Ariel Castro had already pleaded not guilty to a 329 count indictment that includes multiple charges of kidnap and rape.