Ryan Phillippe's Ex Lawyers Up

Originally posted Mar 18th 2011 6:55 PM PDT by TMZ Staff

Ryan Phillippe's ex/alleged baby mama has lawyered up ... and a legal battle is now brewing ... TMZ has learned. 



Alexis Knapp -- the model/actress who claims to be carrying Ryan's baby -- has hired Mark Vincent Kaplan.

Ryan has said he'll take a DNA test once the baby is born and support the child if it's his, but Alexis is not satisfied.

And here's a fun fact.  Kaplan repped K-Fed in his divorce/custody battle with Britney Spears.

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