Birkhead to Opri -- I Hit the Bar

TMZ has learned Larry Birkhead has filed a formal complaint against Debra Opri with the State Bar of California.

We're told in his complaint, filed June 8, Birkhead claims Opri "misappropriated" hundreds of thousands of dollars he earned from a network TV deal and won't give it back. Birkhead asked the State Bar, "Please help me."