'X-Men' Director Bryan Singer -- I'm Raising My Kid with the Baby Mama

"X-Men" director Bryan Singer will raise his baby with the woman who is carrying it ... TMZ has learned.

Turns out, sources familiar with the situation tell us ... Michelle Clunie will raise the baby as her own after he or she is born. She will be listed as the mother on the birth certificate. She is NOT a surrogate.

We're told Bryan and Michelle have been friends for years and he's wanted this baby for a long time.

Our sources say the 2 are not romantically involved, but rather extremely close friends.

Contrary to reports, we're told Michelle will not get paid for carrying the baby, but Bryan will cover living expenses ... which is roughly equivalent to informal child support. He's already purchased a place for her to live just doors down from his West Hollywood home.

And our sources say ... the decision to have a baby was made long before Michael Egan accused Singer of molesting him when he was a minor. Egan dropped his lawsuit against Singer.