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Poor, Tara Reid -- she's been dissed by the only movie that gave her any cred to begin with!

The troubled actress is making her way back to the American Pie franchise in the upcoming flick American Reunion ... but for the lowest salary of any of the returning cast members.

The franchise is bringing back the whole cast from the 1999 original for the first theatrically released Pie flick since 2003.

Jason Biggs and Sean William Scott will rake in $5 million each, plus part of the movie's profits, according to The Hollywood Reporter, while How I Met Your Mother star Alyson Hannigan and Eugene Levy will rake in $3 million.

Tara, on the other hand, is only getting $250,000.

Now that can't feel good ... but at least she's employed!