The teenager whose online relationship with Anthony Weiner threw Hillary Clinton's presidential campaign into a tailspin is revealing her face for the first time.

In an interview that will air in full on Monday, the teenager told Inside Edition how quickly the messages she exchanged with the disgraced New York congressman turned lurid.

Read: Sydney Leathers Weighs In on Weiner's Latest Scandal: 'He's Quite the Egomaniac'

The girl was 15 when she first contacted Weiner through a direct message on Twitter in January 2016.

"I just sent him a nice message, 'Hello, I'm a huge fan,'" she recalled.

"How soon after did he respond?" Inside Edition's Diana McInerney asked.

"Minutes," she said.

Inside Edition is withholding the girl's name in our report because she's a minor, but her father gave permission for her face to be shown.

The teenager said she contacted Weiner when his wife — Clinton's closest aide, Huma Abedin — was at the peak of her influence. Weiner's proximity to the presidential candidate was what drew the teenager to him, she said.

"I knew that Hillary Clinton would be running for president in the year 2016," she said. "I wanted to see if Anthony was still up to the same antics."

After messaging him, it quickly turned from niceties, she said.

"I knew that it was going downhill really fast," she said.

In one image Weiner sent, he was shirtless with his son.

Read: Huma Abedin and Anthony Weiner to Separate After Latest Sexting Scandal

"I was disgusted," the girl said. "That's part of the reason I came forward."

Tune into Monday's Inside Edition to hear how the teenager's life has changed since her story was shared across the world, and how it led FBI agents investigating Weiner to knock on her door.

For local listings, click here.

Watch: Donald Trump Thanks Anthony Weiner at Rally