Ready for a fresh start after a long 90 days in rehab, Lindsay Lohan posted a confident selfie to Instagram on Tuesday (August 13).

The "Mean Girls" star poses with her Karl Lagerfeld iPhone case, curly long locks, and pouty lips with the caption, "#back@work! So grateful today! :)."

Lately, her work has included guest hosting "Chelsea Lately" and sitting down for an intense interview with the Queen of Daytime, Oprah Winfrey, who will also produce LiLo's eight-part documentary on her life.

Check out the 27-year-old actress's full interview with Oprah on Sunday, August 18th at 9:00pm on OWN.