'Simpsons' Co-Creator Sam Simon GF, Ex-Wife Want Millions

3/3/2016 5:28 PM PST BY TMZ STAFF
EXCLUSIVE

0303_Kate-Porter-Twitter_jennifer-tillySam Simon's girlfriend has filed a claim against his estate ... alleging he promised he'd take care of her after his death ... so she wants money, and lots of it. And ex-wife Jennifer Tilly also wants a bundle.

Kate Porter describes herself in legal docs as "The Simpsons" co-creator's "intimate" partner for the last 3 years of his life. She says Sam promised to leave her $5 million tax free in his will if she agreed to "refrain from continuing to work." She says she agreed and upheld her end of the deal.

Kate says she was by his side until March 8, 2015 ... the day he passed away.   

It's pretty clear from the docs ... Sam didn't make Kate a beneficiary in his will, so now she's going after the estate. 

As for Jennifer Tilly, she claims in separate legal docs her 1993 divorce judgment guarantees her an ongoing community property interest in "The Simpsons" and other Simon projects. Her docs were filed in December, and it's possible she's already settled up.