Actress Mia Farrow revealed her biggest regret of life and it’s the introduction of director-writer Woody Allen to her family. On Sunday's premiere episode of the HBO docuseries ‘Allen v. Farrow’, the 76-year-old actress speaks about falling for Allen, 85, at the start of their relationship, and her daughter Dylan's accusations of sexual abuse against the Oscar winner.

"That's the great regret of my life, that I wasn't perceptive enough. It's my fault. I brought this guy into my family. There's nothing I can do to take that away,”Mia says in the docuseries, reports people.com.

"I get why people can't believe it because who on Earth could believe that of Woody Allen?" she adds. "I couldn't believe it. I couldn't believe it. Everybody admired Woody so much, loved him, and I did too."

“Allen v. Farrow” is a four-part docuseries with new episodes airing on HBO

In the docuseries, Mia says she approached Allen about conceiving a child together, to which she says the filmmaker agreed on the condition that he could come and go as he pleased with no parental attachments. When the two couldn't conceive a baby, Mia says she asked Allen how he would feel about adopting a child.

Allen's further response, Mia alleges, was a portentous one. "He said if I wanted to do that that it wouldn't ruin the relationship but that he wanted nothing to do with it," she claims in the docuseries.

"I thought, 'That's fair.' He knew the kind of children that I adopted that were all from different countries with different needs. He said, 'I might be more kindly predisposed if it was a little blonde girl.' I thought if he cares about that I should try to find a little girl like that and maybe he'll love her. I eventually ended up with a little blonde girl and that was baby Dylan."

After Dylan's adoption, Mia and Allen conceived their son, Ronan Farrow. It was after his birth that Dylan alleges Allen began to show her "intense affection" to the point where she would begin to hide from the filmmaker whenever he was around her.

"In time, what it became (that) was there was nobody but the two of them. He didn't want to see the other kids, he wanted to see her. She started running away from him. She started locking herself in bathrooms,” Mia says in Allen v. Farrow.

When Mia told Allen she was uncomfortable with the way he treated Dylan, she says he became angry.

"It was as if I'd accused him of being an ax murderer. I was crying and I apologized. And sometimes he would say, 'I honestly think you need help.' And I began thinking, 'I must be crazy. He can't be a pedophile.' I wanted to believe that he was not capable of what I feared,”Mia says in the docuseries.

In December 1991, Allen legally adopted Dylan and about a month later, Mia says she found "pornographic" polaroids of her adopted daughter, Soon-Yi Previn, in Allen's apartment.

When asked about the photographs, he said, "First he said, 'I'm in love with Soon-Yi, I would marry her’. Then he said, 'No, I just said that it's something I thought of in the car, I thought it would make it better if I put it that way. No, I love you.' It was all of that for four hours, 'I just made a mistake, I lost control.' I didn't know what to think, I just needed him to get out."

Mia was a mother to seven children before meeting Allen: twins Matthew and Sascha Previn, Lark Song Previn, Fletcher Previn, Summer "Daisy" Song Previn, Soon-Yi Previn and Moses Farro