Justin Timberlake is said to have proposed to his girlfriend Jessica Biel on a sightseeing holiday in Rome.

The couple - who have been dating for 18 months - recently attended actress pal Beverly Mitchell's wedding in the romantic city - sparking rumours that the couple are also ready to take a trip down the aisle.

At only 27 the trousersnake seems young to be contemplating marriage, yet spies have told a U.K. publication that they couple are engaged.   
 
An insider tells the Sunday People, "He planned to propose in Rome because it is such a romantic city. Jessica is over the moon and looking forward to a huge wedding. She can't wait.

"He has grown up a lot in the last couple of years and has decided it is time to settle down."

See Jess and Justin's European love tour below