'Skating with the Stars' Contestant Rushed to Hospital

12/6/2010 5:51 PM PST

'Skating with the Stars' Contestant Rushed to Hospital

"Skating with the Stars" contestant Brandon Smith was taken to a hospital moments ago after throwing up while on set ... TMZ has learned.

Sources tell TMZ ... a 911 call was made from the CBS lot in L.A. -- where the "Skating" set is located -- at 11:43 AM PT.

We're told Smith -- who stars in "Sonny with a Chance" with Demi Lovato -- was throwing up and having difficulty breathing ... and had to be taken by ambulance to a local hospital.

Sources connected with the show tell TMZ Brandon was sick when he arrived on set today -- and it's unclear if he'll be able to skate during tonight's show.

UPDATE 1:30 PM: A rep for the show tells TMZ, "He was throwing up on set and we think it is food poisoning."

UPDATE 3:40 PM: We're told Brandon will not be performing on tonight's show.