Charlie Sheen Pens Repentant Letter to Ashton Kutcher

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Cocktails with Charlie Sheen to promote his new syndicated series are what's hot at NATPE Jan. 23.

After calling out Ashton Kutcher for the first time since he took over his starring role on CBS' Two and a Half Men, Charlie Sheen is taking a step back.

The former series star, and lead on FX's upcoming Anger Management, took to Twitter on Tuesday morning to apologize for bringing the actor into his takedown of his former gig.

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"Dear Ashton," he wrote, linking a full letter on his WhoSay account. "My bad. I was disrespectful to a man doing his best. I got excited and threw you into a crossfire. The rest of my statement I stand behind. You, however, deserve better. Safety in your travels good sir. - The 'late' Charlie Harper."

That excitement involved Sheen calling into TMZ and saying, "I'm tired of pretending the show doesn't suck."

"It's nothing personal,” Sheen added. “I just feel bad for him. He's saddled with such bad writing."

Sheen has gone back and forth in his comments about "Two and Half Men" since leaving the series. Despite the fiery words thrown at the time of his departure, he's been relatively even-keeled since the series returned without him.

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After the season opener drew nearly 28 million viewers in September, Sheen called the premiere "really good" and referred to Ashton as "terrific."

As recently as January, Sheen told The Hollywood Reporter he felt Kutcher was doing "the best job that he can," insisting that he and co-stars Jon Cryer and Angus T. Jones deserve better material.