During the making of the film, Bridgitte Nielsen, the actress who played Ludima Drago, was engaged to Sylvester Stallone
Sylvester Stallone was carrying only 5 percent body fat whilst filming for rocky 4. Realistically, if Rocky had reduced his calorie intake so drastically that he appears more like a 'bodybuilder' in the ring as opposed to a 'real' boxer (George Foreman bodytype for example), he would have been too weak to fight Drago.
Contributed by: Stefan Wadstedt
Despite what a lot of people in the USA think, Dolph Lundgren
is from Sweden and not Russia as depicted in the movie.
Contributed by: Tony Cross
There was a scene in the trailer that wasn't in the movie. It dipicts Rocky standing in front of a boxing commission who states that Rocky will be stripped of his title if he fights in Russia. This scene appears in the DVD trailer.
Contributed by: Ryan Long
"Rocky IV' is the only film in the series in which Rocky is referred to professionally by another nickname than "The Italian Stallion". In the pre-fight commentary, the American commentator refers to Rocky as "The Iron Horse."
Contributed by: Nick And Reyes
Drago's wife in the movie, Brigitte Nielsen
, is Stallone's ex wife in real life!
Rocky IV is the highest grossing boxing film of all time.
During the second training montage, Drago is once again seen hitting the pad that measures the pounds of pressure per square inch. The number shown is 1850. The second number shown is 1990. If you're a ROCKY bluff like I am, you will remember that ROCKY V was released in the year 1990.