The Mean Girls star joined a string of actresses who took part in a spoof infomercial for a new fitness rage – Humpilates.
While stars such as Scarlett Johansson, Jessica Biel and Minka Kelly performed pelvic thrusts with huge gym balls, Lohan’s appearance came at the end of the sketch.
'The Jimmy K programme is so affordable it’s practically a steal,' Kimmel declared with Lohan standing by his side.
'Allegedly,' smirked the actress, who stands accused of stealing a gold necklace from a Los Angeles jewellery boutique.
Kimmel's chat show audience roared with laughter as the host aired his star-studded post-Oscars video on Sunday night.