Frankie Muniz, 26, just revealed on Twitter that he was hospitalized last Friday for a "mini stroke."
"I was in the hospital last Friday. I suffered a 'Mini Stroke,' which was not fun at all," he tweeted Tuesday morning. "Have to start taking care of my body! Getting old!"
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The Malcolm in the Middle star, who turns 27 tomorrow, did not reveal any more details on his condition.
He does, however, appear to be in good spirits, tweeting about his band Kingsfoil's upcoming shows.
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"Next Sunday night my band is playing a show close to where I grew up in Teaneck, NJ at Mexicali Live!," he says. "Hope to see my old friends and family!"