When David was in Venice filming Casanova the Touchstone Casanova was also filming at the same time. Here is an excerpt from The Sunday Times March 6, 2005:
"While filming in Venice, the unit called themselves Little Casanova, because the megamillion Hollywood version, starring Heath Ledger, was also in town and sharing their production facilities. When the city flooded, Big Casanova bided its time; Tennant’s gang strapped plastic round their trousers and got on with it. "
My favorite quote from the article though -"he may be a hot name right now" - HA!