Nicole Richie has hit out at the recent rumours that she was pregnant with her third child by branding them "irresponsible" and "mean-spirited".

The celeb mum to daughter Harlow, 3, and son Sparrow, 1, denied the baby bump rumours, which started last week after she was spotted with a slightly rounder tummy than usual.

"Contrary to recent speculation, I am not pregnant," Nicole told Gossip Cop. "This irresponsible reporting continues to feed an atmosphere of self-doubt and insecurity."

"To publicly point out a change in anyone's body shape is mean spirited and cruel. People's bodies change and change again," Nicole continued.