Actress Ashley Olsen has dismissed reports she is planning a secret wedding to National Treasure star Justin Bartha.

The National Enquirer claimed last week that Olsen and Bartha were to wed in a lavish $1 million ceremony on the French Riviera next summer.

But Olsen's representative has denied the rumours, insisting the young stars are happy just dating.

Nicole Caruso tells People.com, "Contrary to several tabloid reports, Ashley Olsen is not engaged to be married. Ashley is dating Justin Bartha and they are very happy."

Olsen has been dating 30-year-old Bartha since the beginning of the year.