The power of social media reunited adopted sisters who have searched for each other and lived apart for years within hours.

Katie Doak, 17, who was adopted when she was 18 months old, has looked for her half sister and biological mother for about five years, but decided to take the search to Facebook Monday, according to 12 News.

Doak created a community page and posted an image holding a sign that read:

"Hello, my name is Katie. My birth name was Katherine Rebecca Leigh Wilson. I was born on Oct. 10, 1997 in Jefferson County Kentucky. I am seeking out to find my birth mom & half-sister to find out about my biological family. My birth mom's name is Cynthia Michelle Wilson. She was born May 9th, 1977 (38) in Louisville Ky. Has moved around to Az, Ky, and In. My sister's name is Kelsey Wilson. She was born April 16th, 1996 (19) in Ky. PLEASE HELP ME FIND THEM!!!"

The post was shared thousands of times and within 2 1/2 hours Doak got her sister Kelsey Wilson’s contact information,

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Doak started scanning her sibling's Facebook page, amazed to see a similar post on the page.

"Hi, my name is Kelsey. I'm looking for my sister! Her name is Katherine Rebecca Wilson. As far as we know, she lives in Arizona. Her birth mothers name is Cynthia Wilson. Please 'share' this and help me find her!"

The sisters caught up over the phone.

"It wasn’t as awkward as I was expecting it to be, it was more like I've known her and it was really easy to talk to her," Doak said to People. "She's really sweet, and I really look forward to getting to know her a lot more."