Ashton Kutcher talks Twitter, Charlie Sheen, and Two And A Half Men

'I can't be more specific than that,' Kutcher says of his hotly anticipated role in the CBS show made famous by Charlie Sheen, who he is replacing after the troubled actor was sacked from the comedy sitcom.

Asked whether Sheen had spoken to him about taking over his old job, the Dude Where’s My Car? star tells Details magazine: 'I don't know him. I've never met him in my life. But, you know, he sent me congratulations and wished me well via Twitter.'

In the interview with the US magazine, Kutcher also talks about his life as 'Silicon Valley's Secret Weapon' – a reference to his role as an investor and developer of social media.

He reveals that his interest in the internet as a “powerful” tool for communicating with “the masses” was sparked by playing around with Twitter and Facebook.

'One person can have just as loud a voice as an entire media corporation,' he says about Twitter.

But Kutcher, who admits he has 'digital-free days' to avoid being the kind of person who is on their phone all the time, also thinks people do not have different online and offline lives.

'If you're an hole offline, you're probably an hole online,' he says.

He also revealed that he believes the Tom Cruise movie Minority Report is an accurate portrayal of where the future of technology is headed.

'I think the next big thing will be wearable technologies. You'll have a bracelet that will perform functions for you – it'll track your health, your movement, your sleep and your activity – and by wearing a couple of rings, you'll be able to type in the air or take pictures with your fingers,' he predicts.