Two long-lost sisters united through DNA website

The two sisters unknowingly grew up near each other in New York and are now reconnecting, making up for lost time.
2:01 | 04/06/19

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Transcript for Two long-lost sisters united through DNA website
Finally tonight, two long lost sisters and the moment they will never forget. I have no idea what she looks like. Reporter: With anticipation building -- I'm really nervous. Reporter: -- Looking for the sister she thought she would never meet, about to come down an escalator. 45 years ago, my mother told me that if a lady ever came to the front door knocking on it and saying, I might be your half-sister, I should believe her because prior to she and my dad getting together, she had had a child. I can't believe I finally got here. Reporter: But this is a meeting she was never expecting. She was adopted at birth, but never knew who her biological family was until she got a match through a DNA website. Well, I was shocked. I mean, I had no idea that I had a sister out there, and I was very pleased at the same time. I mean, I always had wanted a sister, and I went, oh my goodness. I bet this is the person my mother talked about 45 years ago. And lo and behold, it's exactly who it was. Reporter: The two instantly connecting. First writing to each other, then talking on the phone realizing they both grew up in the same state, New York, just 120 miles from one another. Well, from day one we had been very comfortable with each other. Not finding out we have a lot of similarities. Reporter: Then they decided to meet each other face to face. We have got a lot of people that want to meet you. Reporter: The two already planning a summer vacation in South Carolina together, and eventually a cruise, something they both love to do. This is my big sister. Now what do I do with big sisters? What do I do with a little sister? And tonight we thank both those sisters for sharing their story. Thanks so much for watching. I'm Tom llamas in New York. "Gma" in the morning.

This transcript has been automatically generated and may not be 100% accurate.

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