WATCH: Lion cubs could be RTE's biggest stars

There's a serious cute warning in tonight's episode of 'The Zoo'.

RTE One's new series of 'The Zoo' is showing its second episode tonight and we're sure there's a couple of lion cubs on it that will catch the nation's hearts.

The two adorable, little tykes were born to their mother Suri and leader of the pride Kumar recently, and can be seen frolicking around on your screens at 7pm tonight.