Russell Brand has launched a bitter attack on Australian media mogul Rupert Murdoch by comparing him to Adolf Hilter in an controversial online rant.

The British funnyman, who is dating socialite Jemima Khan, was left fuming after editors at one of Murdoch's British tabloids printed an interview with model Sophie Coady, who alleged she enjoyed a fling with Brand earlier this year (13).

Brand is adamant that suggestions he slept with Coady behind his girlfriend's back are untrue, and he has now published a lengthy rant on in which he compares News International boss Rupert Murdoch to Nazi leader Adolf Hitler.

The Forgetting Sarah Marshall star writes, "In the general scheme of things... it might not seem like a big deal. That's because it isn't to anyone, except me or my girlfriend. The pain, disruption and distress... (this caused me) is a pale liver-spot on the back of Murdoch's glabrous claw... Rupert Murdoch, an animatronic al-Qaida recruitment poster... referred consistently to his pride in (his newspaper) the Sun as 'a trusted news source'. Trusted is the word he used, not trustworthy... He uses the word 'trusted' deliberately. Hitler was trusted, it transpired he was not trustworthy..."

He adds, "(Murdoch's newspaper) loves me when I'm a prattling, giggling, Essex boy 'Sh**ger of the Year', when I'm in my proper place, beneath vacuous headlines... But if I use my glistening podium, to talk to the people I grew up with, or signed on with or used drugs with, vulnerable, overlooked, undeserved, ordinary people, people that can't sue them as I am, then out come the fangs."