TomKat wedding a Mission: Improbable

Katie Holmes and Tom Cruise

A romantic Italian wedding for Hollywood star Tom Cruise and actress Katie Holmes might be a Mission: Impossible.

The priest with jurisdiction over the dreamy lakeside castle tipped as the chosen location for the wedding says his parish won't marry Cruise, and the mayor says she can't because the two have not signed the official paperwork.

The small Italian town of Bracciano has been swarming with paparazzi since Italian newspapers said the couple would be married at Castello Odescalchi.

The priest also says that whatever ceremony Cruise and Holmes has, it cannot be Catholic because Cruise is divorced and does not have parish permission to remarry.