Lindsay Lohan has a secret half sister
- Photo: ROLO/GSI1 of 13
- Photo: CHARLIE LUCIANO/StarTraks2 of 13
- Photo: James Devaney/WireImage3 of 13
- Photo: Asadorian-Mejia/Splash News4 of 13
- Photo: Gilbert Carrasquillo/GettyImages.com5 of 13
- Photo: Kevin Mazur/WireImage6 of 13
- Photo: Jamie McCarthy/WireImage.com7 of 13
- Photo: Jae C. Hong/Invision/AP8 of 13
- Photo: Dick Yarwood/Invision/AP9 of 13
- Photo: Teach/Fame Flynet10 of 13
- Photo: Diane L. Cohen/WENN11 of 13
- Photo: Mariotto/Bauer-Griffin12 of 13
Lindsay Lohan has been dealt a shock after a televised paternity test 'proved' long-running rumors her dad Michael has another daughter.
Kristi Horn has spent four years trying to convince Michael Lohan he is the father of her 17-year-old daughter Ashley, and he agreed to settle the matter by taking a DNA test on "The Trisha Goddard Show."
In the big reveal, which airs on Thursday, Michael comes face-to-face with his alleged lovechild for the first time as Goddard reads out the positive result, prompting Kristi to break down in tears.
RELATED: Hollywood's Oldest Party Animals
Michael, who had previously denied the allegation, stands up to hug the teenager, but she tries to resist, saying, "This is the first time I've met you. I'm sorry, but I'm not sure ..."
RELATED: Famous Younger Siblings
He replies, "It's OK. Everything in time, honey."
Born-again Christian Michael has four children with Dina Lohan, including "Mean Girls" star Lindsay. He is reportedly expecting another child with his longtime girlfriend, Kate Major.
Get out the vote
Fergie, Sarah Jessica Parker, and Heidi Klum all get an F on this week's Fashion Offenders.Watch Video »
Diva Double Date
Beyonce and Alicia Keys double date with their famous hubbies on today's Celebs Gone Social.Watch Video »
Where Are They?
See what the cast of "American Beauty" is up to today.Watch Video »
J.Lo's Mini Me
Prince Harry, Jessica Alba and more stars who threw out the first pitch at baseball games.Watch Video »