British actress Imogen Stubbs has accused the stars of The Great Gatsby of ruining the dialogue of Baz Luhrmann's adaptation of F. Scott Fitzgerald's literary classic by mumbling and "garbling" their lines.

The Jack & Sarah star insists she struggled to follow conversations between the characters played by Leonardo DiCaprio, Tobey Maguire and Carey Mulligan due to the awkward way in which they were reciting the script.

She tells Britain's The Observer, "You're just longing for it to stop... I thought the actors looked embarrassed."

And Stubbs insists Hollywood's mumbling doesn't end with The Great Gatsby: "It was so drummed into us at drama school that 'it's unforgivable not to be clear and heard'... The naturalistic, mumbling acting style tends to go with people who are playing something closer to their obvious self... People who are playing against their obvious self tend to embrace the acting a bit more.

"Acting is playing. You are pretending. Simon Russell Beale or Alex Jennings are theatrical actors who are naturalistic. You can hear them and people love them."