The 27-year-old actress, who is set to appear on the season finale of the HBO hit, will play Kenny Power's illegitimate daughter.
After filming, Lohan reportedly got a standing ovation from the cast and crew and even shared a hug with series creator Jody Hill.
According to TMZ, the fresh-out-of-rehab star had a sober-living coach with her at all times while she was on the North Carolina set. Lohan reportedly wants to make sure people know she is serious about her recovery.
And so far she's done a good job. In addition to her successful guest spot on "Eastbound & Bound" Lohan killed it while performing as a guest host on Chelsea Lately last week, where she famously took a jab at "Twilight" starlet Kristen Stewart for finally "showing some emotion."