Lindsay Lohan has a half-sister, according to a DNA test taken Thursday on "The Trisha Goddard Show."

Michael Lohan, 52, finally agreed to take the paternity test, which ultimately revealed that he is the father of 17-year-old Ashley Horn. Kristi Horn claimed to have had a relationship with Lindsay's father more than 17 years ago while he was still married to the actress's mother Dina Lohan, according to RadarOnline,  

In a clip shown from the daytime talk show, the TV host is seen asking who wants to open the DNA results envelope. Ashley volunteered stating, "I'll do it, it's my life."

Michael then added, "It's all of our lives."

Ashley opened the envelope containing the DNA test and moments later, Kristie broke down in tears while Ashley remained silent.

Goddard leaned over to look at the results and announced "Michael is Ashley's father."

"You have another daughter and you missed out on 17 years of her life," Kristi said through her tears to Michael. "You have known about Ashley since the beginning! You've been promising to take the DNA test. How could you do something so cruel?"

Ashley said her biological father Michael has never been there for her and even refused to acknowledge that she was his daughter, TMZ confirmed. The only time Michael made any attempt to be in her life was in her early childhood.

"Being there and then disappearing," Ashley told Michael. "You've talked to me when I was seven-years-old. Why would you even tell me to call you daddy?"

Ashley said on "The Trisha Goddard Show" that she does not want to be a part of the Lohan train wreck.

"Access Hollywood" sat down with Goddard after the taping of the show to get more information about what else happened.

"I think he knew," Goddard told "Access Hollywood." "I think he could see all of the similarities. It's one thing looking at a photograph - it's another seeing someone in the flesh."

Goddard added, "I don't think it was that much of a shock to him. I think he's probably known all along."

In addition to the four children Michael has with his ex-wife Dina Lohan, he is expecting another child with long-time girlfriend Kate Major.