'X-Men' Director Bryan Singer -- I'm Havin' a Baby

"X-Men" director Bryan Singer is having a baby ... and the baby mama is his longtime friend ... TMZ has confirmed.

Michelle Clunie is now living a few houses away from Singer ... something he clearly wanted because he bought the West Hollywood pad so she could be close to him.

Our sources say she's around 7 months pregnant.

We're also told the decision to have a baby has nothing to do with the recent accusations by a man who claimed Singer sexually assaulted him when he was a minor ... something Singer denies. The accuser dropped his lawsuit against Singer.