Charlie Sheen and twitter is the perfect combination for some interesting reads.

The 48 year-old has used the social media site as platform to target an array of celebrities over the years and now Ashton Kutcher is next on his list.

It has been nearly three years since Sheen had a public meltdown and was eventually let go from 'Two and a Half Men', and it seems he still isn't satisfied with who the program got as a replacement.

Kutcher was cast as 'Walden Schmidt', a billionaire internet entrepreneur who got divorced and is now suicidal, he was introduced at the beginning of the ninth season.

'Walden' decides to buy the late 'Charlie Harper's' (Sheen) beach house after his tragic death in France, but as in the previous series Charlie's brother, Alan and his son, are still living in the property.

Sheen does not appear to be a fan of 'Walden' and blasted him on, you guessed it, twitter.

The one-sided rivalry began on Sunday (Jan 5th) after Charlie praised former co-star Jon Cryer.

"hey Jon!!!," he wrote, "u r a GENIUS!!! I ... love and MISS YOU old pal! Q; who's your lame side-kik? c #NiceTryCanonBoy #CH."

The tweet was accompanied by a photograph of Cryer and Kutcher in a CBS promo commercial for the show.

The next day (Mon 6th), Sheen posted another tweet which was a very indirect apology, as the 'Scary Movie' actor took another swipe at Ashton.

"hey relax everyone! read the hash tag!, he continued, "Jon I'm so sorry I insulted your sidekik I meant REALLY lame c,"

In another tweet directly aimed at the 35 year-old, Charlie wrote, "hey Ashton sorry bro all good. now quit barfing on my old brilliant show. Remember Punk'd? how duz it feel? c harp."

Not surprisingly, there hasn't been a twitter-response from Kutcher, and even though Charlie is now starring in FX's 'Anger Management', the CBS sitcom is still very important to him.

Charlie Sheen
Kutcher replaced Sheen at the start of season 9