(CNN) - The composer of the popular song "Eye of the Tiger" filed a copyright infringement complaint against Newt Gingrich on Monday.
Rude Music, Inc., owned by the song's co-composer Frank Sullivan, is suing the Republican presidential candidate for using the Grammy-winning song -—widely known as the anthem for the movie "Rocky III" - at events dating back to 2009.
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The five-page complaint says the Gingrich campaign has played the tune while the candidate took the stage at numerous events in this election cycle, as well as during the annual Conservative Political Action Conference (CPAC) for the past three years.
The document claims Gingrich is "sophisticated and knowledgeable" of copyright laws, arguing that the former House speaker has authored more than 40 copyrighted works, himself.
It also brings up the candidate's opposition to the proposed Stop Online Piracy Act. At a recent debate in South Carolina, Gingrich said, "We have a patent office, we have a copyright law. If a company finds that it has genuinely been infringed upon, it has a right to sue..."
The Palatine-based Rude Music is asking that Gingrich’s campaign discontinue its “unauthorized” use of the song, in addition to pay damages determined by the Illinois court where the suit was filed.
The Gingrich campaign did not immediately respond to requests for comment.
– CNN’s Justin Lear contributed to this report.