Lindsay Lohan to Guest Star on Eastbound & Down Series Finale

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Lindsay Lohan is out of rehab and off to HBO.

The scandal-filled actress Tweeted yesterday that she is "so grateful" to be back to work - and now we know exactly what she's working on:

Insiders confirm to E! News that Lohan will appear on the Eastbound & Down series finale.

Look for the Mean Girls star to come on board in some kind of flash forward, as the HBO source teases Lohan will be portraying one of the main character's daughters in an upcoming wedding scene.

Lohan and Danny McBride

Eastbound & Down kicks off its run of final episodes on September 29.

Lohan, meanwhile, recently completed a 90-day stint in a treatment facility and has been making her way back into the entertainment scene via hosting stint on Chelsea Lately and an interview with Oprah Winfrey on OWN.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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Eastbound & Down Quotes

So as I was saying, the amount of money I am gonna be making would hurt your parents feelings. You remember the class where I taught you all how to make it rain? That's what I'm gonna be doing every single night - dolla, dolla bills, y'all...

Kenny Powers

Down there I fought and fucked my way to being the greatest gringo that country has ever seen.