Actress Lindsay Lohan poses at the 2008 MTV Movie Awards in Los Angeles in this June 1, 2008 file photo. Lohan was released from jail early August 2, 2010 after serving 13 days of a 90-day sentence and taken straight into a rehabilitation program, according to the Los Angeles County Sheriff's Department. REUTERS/Mario Anzuoni/Files (UNITED STATES - Tags: PROFILE ENTERTAINMENT CRIME LAW)

London - A paternity test has revealed that Lindsay Lohan's father has another daughter.

The Liz & Dick star's dad Michael Lohan appeared on The Trisha Goddard Show to find out whether 17-year-old Ashley Horn is the actress's half sister and he now wants to get to know the teenager after a sample of his DNA proved positive.

He told RadarOnline: “While I am sorry this took so long, we finally have the answer, we are all okay with it and we will deal with it in the best way!”

Michael - who has four children with ex-wife Dina Lohan and is currently expecting a baby with his 29-year-old girlfriend Kate Major - allegedly avoiding taking the test for four years.

Ashley’s mother Kristi Horn pushed for the test but she Ashley told the show: “I don't want to be part of the Lohan trainwreck.”

She also attacked Michael for refusing to acknowledge her in the past.

She said: “What gives you the right to tell me that the kids have a right to disown me. What made you say that to me? How can you keep lying?” - Bang Showbiz