Los Angeles, Jan 8: Actors Charlie Sheen and Ashton Kutcher have got into a war of words on Twitter.
Sheen recently took to the microblogging site to connect with his former co-star Jon Cryer. It was followed by rude comments on Kutcher, reports aceshowbiz.com.
"Hey Jon! You are a genius! I...miss you old pal! Question: Who's your lame sidekick? Nice try Canon boy," Sheen tweeted Jan 5.
Sheen was succeeded by Kutcher on TV show "Two And A Half Men" and the 48-year-old seems to have referred to Kutcher's camera advertisement, but the "No Strings Attached" star did commercials for Nikon brand, not Canon.
Sheen then apologised for insulting Kutcher and posted: "Jon I'm so sorry I insulted your sidekick."
But also added: "Hey Ashton sorry bro all good. Now quit barfing on my old brilliant show."