Ashton Kutcher and rumord fiancee Mila Kunis have been busy these days but for entirely different reasons. Ashton Kutcher's three-year word war with Charlie Sheen is back on while Mila Kunis inks another ad campaign.

Ashton Kutcher, in an interview on Jimmy Kimmel's show on Wednesday night, told the "Anger Management" star:

"Dude, shut the f-k up! "Like, enough already. Like it's three years later and you're still blowing me up on Twitter. Come on, dude! Really?"

It's no secret that Charlie Sheen was slighted when he was replaced by Ashton Kutcher in the hit sitcom "Two and a Half Men" three years ago. Ashton Kutcher's latest rant stemmed from a twitter post by Charlie Sheen on February 7 that said:

"hey Ashton

sorry bro

all good.

now quit barfing

on my old

brilliant show.

Remember

Punk'd?

how duz it feel?"

Oddly enough, the text came with the photo of Woody Allen's mugshot.

After the Jimmy Kimmel interview, Charlie Sheen posted an apology:

"Ashton

message received.

so sorry

u sounded like me!

well done!

my bad

I was

pissed at other crap

& took it out on you.

hope u r good

xox

c."

Moments later, Charlie Sheen tweeted a warning: "But news flash Dood, you ever tell me to shut the F*** up, EVER again, and I'll put you on a hospital food diet for a year. c #YaFeelMe Jr?'"

Hopefully, the two will patch up their differences but with Charlie Sheen, nobody really knows what's next.

Meanwhile, Ashton Kutcher's girlfriend and rumored fiancee Mila Kunis was tapped to become the face of Gemfields, a leading supplier of colored gemstones, according to E! The "Jupiter Ascending" star appeared in the ad campaign sans makeup.

Mila Kunis explained to British Vogue magazine: "When we talked though the direction and that the focus was on natural beauty-which really meant no makeup, no blow dry, and no retouching-I have to say I was a little anxious. Peter (Lindbergh, the photographer) has a way of making you feel bare and raw, but in a funny way it's the most beautiful I have ever felt on a photo shoot."