Are there any legal actions available to someone who was deliberately misled and entered into an engagement and spent money on wedding dress, etc.?

Over the course of a year, a friend became romantically involved with a person claiming to be a celebrity. Recently she became concerned that this was not his true identity. She has spent a great deal of money on wedding expenses before his behavior began to throw up red flags. She might wish to seek recompense for the wedding costs or anything else if he indeed turns out to be lying.