The 21 year old, who starred alongside Demi Lovato in Sonny With A Chance, is currently competing on the Dancing With The Stars spin-off programme, alongside rocker Vince Neil and actress Rebecca Budig.
Smith was reportedly suffering from a stomach virus when he arrived at the Los Angeles set for rehearsals on Monday morning (06Dec10).
But the Disney star began experiencing difficulty breathing and was taken by ambulance to a nearby hospital, reports TMZ.com.
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As WENN went to press, it was not known whether Smith would be able to perform on Monday night’s (06Dec10) live programme.
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