Blonde beauty Reese Witherspoon was left disappointed when Johnny Cash's children told her she wasn't busty enough to play their mother JUNE CARTER CASH.

The Sweet Home Alabama actress, who is hotly tipped to win an Oscar for her portrayal of the country singer, was left disappointed by the slight on her physique, but she refused to dwell on the size of her chest.

She says, "I was informed that my b**bs weren't big enough."