A source explained: "Tom has been invited to King Charles' coronation and there is no way he would have ever turned it down.
"It is a hugely prestigious event and Tom is a real royalist - plus he is now close with Prince William and Kate. Tom has told film bosses to shut down the production on 'Mission: Impossible' over the coronation weekend to make sure he can attend."
Cruise's decision has shocked the production staff working on the new 'Mission: Impossible' movie.
But the film star is determined to attend the event.
The insider told The Sun newspaper's Bizarre: "It shocked some people on the film, as Tom is so dedicated to his craft and would never normally deviate from his intense production schedules."
"But something as important - and grand - as King Charles's coronation is something he would not want to miss out on."
"It is a huge thing for Tom to be invited and he is honoured."