People began speculating if DiCaprio, 40, and Rihanna, 27, were a couple a few weeks ago, after they were spotted attending a birthday bash at the Playboy Mansion.
They were spotted again at another birthday party at a West Hollywood hotel shortly after, reported Los Angeles Times.
The actor's representative, however, said he 'is single and has been for some time,' and he has 'been focused shooting' his new film 'The Revenant' in Canada.
The adventure drama is helmed by Alejandro Gonzalez Inarritu who recently won the Best Director at the Oscars for his work in 'Birdman'.