Charlie Sheen is mad at Rihanna after she allegedly ignored his fiancée at a restaurant last night (May 21). The two are now engaged in a mini-war of words over an incident that occurred in Santa Monica, Calif., where Sheen was celebrating his wife-to-be's birthday. 

Apparently, the actor asked if his lady love could meet Rih Rih, but the bajan beauty wasn't up for a face to face. The Anger Management star hit back at her with a long-winded Twitter post. "Nice impression you left behind, Bday or not," he wrote. "Sorry we're not KOOL enough to warrant a blessing from the Princess. (or in this case  the Village idiot)."

Throughout the rant, Sheen makes seemingly immature comments like "I guess Talk that Talk was a lie" in reference to the 26-year-old's sixth studio album, and goes in on the pink wig she's been wearing lately. "Halloween isn't for a while. but good on you for testing out your costume in public. it's close; a more muted pink might be the answer, as in: none," he tweeted.

Unlike Sheen, Rihanna isn't upset about whatever went down inside the restaurant. This morning she tweeted, "If that old queen don't get ha diapers out of a bunch," without addressing Sheen directly. He responded with a poem that includes the line, "clearly English is NOT your primary language."

It typically doesn't take much to bait Rihanna into a nasty Twitter exchange, but she's keeping her cool with this one. Instead of completely engaging, she tweeted out another subliminal shot at Sheen, a photo that reads: "When I'm about to go off and my subconscious be like: nah, chill b."

The last tweet might have been enough to get Sheen to back down because he hasn't fired off a rebuttal.

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 (Photos from left: Jason Merritt/Getty Images, London Ent / Splash News)