Zachary Quinto and Chris Pine played Mr Spock and James T Kirk in Star Trek
The latest Star Trek film was illegally downloaded more than 10 million times in 2009, according to an internet blog site that monitors file-sharing.
The figures suggest it is 2009's most pirated film, ahead of Transformers sequel Revenge of the Fallen.
Guy Ritchie's RocknRolla was the third most pirated movie, with The Hangover and Twilight completing the top five.
The TorrentFreak blog reports on peer-to-peer activity which uses BitTorrent file-sharing software.
BitTorrent is one of the most popular means of transferring large files over the internet.
Other films featured in the list of most illegally downloaded titles include sci-fi thriller District 9 and the sixth Harry Potter adventure.
But X-Men Origins: Wolverine ranks fairly low in the Top 10, despite an unfinished version of the film appearing online ahead of its release.
Directed by JJ Abrams, Star Trek charted the early days of James T Kirk, Mr Spock and other crew members of the Starship Enterprise.