The Mean Girls actress crashed into an 18-wheeler truck in LA yesterday (June 8), totalling her rented Porsche.
She and her assistant were rushed to the UCLA hospital, where they were reportedly treated for minor injuries.
According to police, neither Lohan nor the driver of the truck were under the influence of any substances.
Lohan was released from hospital after undergoing treatment and returned to the set of her upcoming Lifetime biopic Liz & Dick.
Sources told TMZ that the star had several visible bruises and scratches on her body from the crash, but insisted they be covered up with makeup so that she could continue shooting.
The 25-year-old is starring opposite Grant Bowler in the television movie about the tumultuous affair between Elizabeth Taylor and Richard Burton.