KFC has secretly released a chicken nugget burger called 'The Nug-A-Lot'

It's no secret that KFC has a secret menu feature hidden in the restaurant's app, but the latest addition has fast-food lovers excited.

A burger called 'The Nug-A-Lot' has been added to the secret menu.

Spotted by Whirlpool user 'hastyusername', it was described as "basically a fillet burger with nuggets, cheese and supercharged source" and available in a meal for $8.95.

Officially KFC describes the burger as including the "iconic Original Recipe Fillet, cheese, supercharged sauce, mayonnaise, and golden chicken nuggets".

To access the secret menu, and the 'The Nugg-A-Lot' burger, you need to download the KFC app, select your nearest store, tap order and as soon as the menu appears - drag the screen down and hold until you see the Colonel.

KFC Australia’s chief marketing officer Kristi Woolrych told 7NEWS.com.au that the secret menu is updated monthly and will continue for the rest of the year.

“Like The Colonel, we want to keep the rest of the items a secret, so you’ll need to keep your eyes peeled with new items added every month so stay tuned,” Woolrych said.