\"Then that guy didn't show up,\" she added.

Kunis said she had no idea that she was being stood up, but that later that same night, she and Kutcher realized there were romantic feelings between the two of them, so she stayed the night at his place.

She said the second they kissed, there were certainly fireworks. The duo now have two children together.

But before finding her Prince Charming, Kunis admits she had a \"horrible, horrible breakup\" with Culkin, 37, whom she dated for eight years from 2002 until the beginning of 2011.

\"PHOTO:
Ray Mickshaw/Getty Images, FILE
PHOTO: Macaulay Culkin and Mila Kunis are pictured at the Motorola and Air Party in Park City, Utah, Jan. 26, 2003.
>

\"I f---- up, I was an a--hole in my 20's ... it's f---- up what I did and it's f---- up how I did it,\" she said of the split.

She didn't go into details on what happened, but she said it affected her so much that when she became single, she needed to \"figure myself out.\"

\"I genuinely need to know why I did what I did, and, like, regroup myself as a human being,\" she added.

When asked if she has forgiven herself for what happened, she said, \"enough time has gone by\" and that mutual friends have told her that \"everybody kind of forgave everybody for what went down.\"

While Kunis is now happily married to Kutcher, Culkin is dating actress Brenda Song.

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