Lindsay Lohan is getting a new half-sibling.
A spokeswoman for her father, Michael Lohan, told Newsday Monday that Kate Major, his on-again-off-again girlfriend, "is pregnant with Michael Lohan's baby and she is in her first trimester."
Michael Lohan, 52, and former Star magazine reporter Major, 29, have a tempestuous history. They became engaged in the spring of 2010, with Lohan telling Us Weekly then that Major, who had previously been involved with reality TV star Jon Gosselin, had "been there for five years with me. I think a friendship is more important than anything when you have a relationship, and this is the strongest one in my life."
That July, however, Major filed a report with the Southampton Town Police, claiming a fight had turned physical. Lohan was charged with harassment in the second degree, but Major relented and the judge dropped the case.
Steve Honig, Lindsay Lohan's spokesman, told Newsday, "Lindsay is busy at work today and is focused on her film," rehearsing for the Paul Schrader movie, "The Canyons."
Besides Lindsay, Michael Lohan has three other children with his ex-wife Dina Lohan: Michael, 25, Ali, 18 and Cody, 16.