'Still not afraid': Eminem celebrates 11 years of sobriety with powerful message

Eminem has marked 11 years of being sober with by paraphrasing some of his most well-known lyrics, telling fans he's "still not afraid".

The 46-year-old rapper, real name Marshall Mathers, celebrated the milestone by posting a photo of himself on Twitter and Instagram holding a sobriety coin.

The coin features the Roman numerals XI - for 11 years - in its centre, along with the words "service", "unity" and "recovery", while the photo's caption read "11 years - still not afraid".

Eminem's struggles with addiction have been well documented. He was hospitalised in 2007 after overdosing on methadone and has said he was taking up to 60 Valium and 30 Vicodin pills a day before entering rehab.

Fans have been quick to congratulate the 'Rap God' hitmaker on social media.

Eminem recently made headlines in New Zealand by setting a new attendance record for Welllington's Westpac Stadium, with more than 46,000 fans turning out to see his Rapture concert.