Michael Lohan got hitched to baby mama Kate Major. Sorry if we aren't sending a cookie bouquet to the on again/off again couple -- we just mostly feel sad for that kid of theirs.

The 54-year-old deadbeat dad wed Kate, who is pregnant with baby No. 2, on Oct. 30th in a private ceremony at Hillsboro Beach, which in the classiest state of 'em all -- Florida. While Michael, Kate and Landon looked pretty pumped at the wedding -- it turns out that Lindsay and Michael's four other children -- weren't on the invite list to dear old dad's nuptials.

While the couple is trying to look like a picture perfect family -- there are some troubled waters in their past. Major, who met Lohan when she was a reporter at Star magazine, was arrested in March for a DUI, convicted and then sentenced to eight months behind bars. The blushing bride was released in late September. And as for Michael Lohan's past -- he's just Michael Lohan.

Major (who changed her Twitter handle to Kate Major-Lohan) confirmed the news via social media -- referring to MiLo as her "hubby."

Umm ... congrats?