Charlie Sheen, who was very publicly fired from Two and a Half men three years, may appear on the series finale in February, his replacement hinted.

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Ashton Kutcher appeared on The Ellen DeGeneres Show on Friday and said that he's "scared" of the finale after hearing how the story will unfold.

When DeGeneres asked if Sheen will return, Kutcher shrugged, adding, "If you're working on the Warner Bros. lot, if there's sirens, come save me."

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His joke about Sheen makes sense considering the history the two actors have had. When Kutcher visited Jimmy Kimmel Live in February, he commented on Sheen's ongoing animosity.

"Dude, shut the f--k up," Kutcher said. "Seriously, like enough already. It's like three years later and you're still blowing me up on Twitter. Like come on dude, really?"

The Jobs actor was referring to mean messages Sheen has sent Kutcher since he took his place on the CBS show.

For example, in January, Sheen tweeted: "Hey Ashton sorry bro all good. now quit barfing on my old brilliant show. Remember Punk'd? how duz it feel?"

Sheen, 49, was fired from the show after he rejected requests from Warner Brothers and CBS to enter rehabilitation. At the time, TMZ published Sheen's response to getting axed and it seemed the actor wasn't bothered.

"I'm thrilled," Sheen told the website. "It insulates me from having to redundantly see myself in the idiotic bowling shirt. Perhaps if Warner Bros. spent as much time and energy focusing on THEIR show, it wouldn't be such a steaming pile of a--."

Tags: Charlie Sheen Ashton Kutcher two and a half men