Lindsay Lohan to guest star on "Eastbound & Down"

Lindsay Lohan is getting back to work.

The actress, who recentlyfinished a court-ordered, 90-day stay in rehab, will guest star on HBO's "Eastbound & Down."

A source told E! News that Lohan, 27, plays the daughter of one of the show's main characters and was filming a wedding scene set "many years in the future," with her character as the bride.

On Tuesday, Lohan shared a photo of herself on Instagram, writing, "back@work! So grateful today! :)"

Since leaving rehab last month, Lohan has guest-hosted an episode of "Chelsea Lately" and sat down for an interview with Oprah Winfrey, set to air this Sunday on OWN.

"Eastbound & Down" returns for its eight-episode final season on Sept. 29.