Tom Cruise's lawyer has shot down allegations the actor stole the plot for his Mission: Impossible - Ghost Protocol film, branding the $1 billion plagiarism lawsuit "bizarre".

Timothy Patrick MCLanahan claims the Hollywood superstar based his 2011 action movie on a copyrighted script, titled Head On, that he had tried and failed to shop to agents at the William Morris Agency in 1998.

He alleges Wma executives then forwarded it to representatives at the Creative Artist Agency, where Cruise and his agent, Rick Nicita, reportedly picked up the idea for the sequel.

However, Cruise's longtime attorney Bert Fields has dismissed the accusations filed against the actor and a number of production company officials.

He says, "Tom Cruise has never stolen anything from anyone. This bizarre lawsuit against 13 people... will be quickly dismissed by the court."

The film grossed a little less than $700 million (£438 million) at the global box office.