Nashville, Tennessee - Dolly Parton has been vaccinated against the coronavirus on video – and urged others to follow suit with an adapted rendition of her hit song Jolene.

"I've been waiting a while, I'm old enough to get it and I'm smart enough to get it," the 75-year-old country icon said in a video posted to Twitter on Tuesday with the caption "Dolly gets a dose of her own medicine."

"So I'm very happy that I'm going to get my Moderna shot today."

The US country music icon supported pharmaceutical company Moderna's vaccine development with a million-dollar donation last year.

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Parton encouraged others to go out and get vaccinated in the video, and then said she had even changed one of her songs to fit the occasion. Parton laughed as she sang the parody, with the name "Jolene" replaced by the rhyming "vaccine."

"Vaccine, vaccine, vaccine, vaccine... I'm begging of you please don't hesitate. Vaccine, vaccine, vaccine, vaccine, cos once you're dead then that's a bit too late," she sang.

"I know I'm trying to be funny now but I'm dead serious about the vaccine," she added.

"The sooner we get to feeling better, the sooner we are going to get back to being normal. So I just want to say to all you cowards out there: Don't be such a chicken squat - get out there and get your shot."

Parton got her jab at Vanderbilt University Medical Center in Tennessee.