ET has the latest...

ET confirms that TV veteran KELSEY GRAMMER suffered a mild heart attack on Saturday, but is resting comfortably at a Honolulu hospital and is expected to be released later this week, his spokesperson said.

The star of TV hits "Frasier" and "Cheers" experienced symptoms Saturday morning after paddleboarding with his wife CAMILLE near their home on the Big Island off Hawaii's Kona coast. He was immediately taken to a hospital where it was determined he had suffered a mild heart attack, the spokesperson said. He was then flown to another hospital in Honolulu.