Frankie Muniz

Frankie Muniz was hospitalized last Friday after suffering what the Malcolm in the Middle star called a "Mini Stroke" on his Twitter.

"I was in the hospital last Friday. I suffered a 'Mini Stroke', which was not fun at all. Have to start taking care of my body! Getting old!" Muniz, who turns 27 on Wednesday, tweeted Tuesday morning.

It's a Malcolm in the Middle reunion!

The actor, who recently appeared as himself on ABC's Don't Trust the B---- in Apartment 23, did not provide further details, but TMZ.com reports that Muniz was taken to an Arizona emergency room after his friends noticed he was having a hard time understand words and speaking.