By Breaking Celebrity News Staff

Surprise! Michael Lohan just ‘officially’ became a dad again (the awkward way - via TV paternity test), and that means Lindsay’s got a new little sister.

A DNA test shows that Lohan, 52, who’s already expecting a baby with his 29-year-old gal pal Kate Major, did indeed father an out-of-wedlock child with a woman who had claimed to have had a relationship with the then-married man more than 17-years ago.

The revelation came on -- where else -- TV!

Lohan -- appearing on an episode of The Trisha Goddard Show airing Thursday on NBC -- gets the news when Goddard hands an envelope with the results of the DNA test to 17-year-old Ashley H