Mona Lisa Vito is Vincent Gambini 's girlfriend in My Cousin Vinny .
This was Fred Gwynne 's last film appearance before his death on July 2 , 1993.The film deals with two young New Yorkers traveling through rural Alabama who are put on trial for a murder they did not commit , and the comical attempts of a cousin , Vincent Gambini , a newly minted lawyer and his overtalkitive fiancée Mona Lisa Vito , to defend them .
My Cousin Vinny