The fitness expert and his wife Rosie are currently expecting their fourth child and already share daughters Indigo and Leni and a son called Marley.
The 38-year-old shared an open account on parenting in a video posted to his Instagram page on Saturday (10 February).
“It’s bloody hard,” he said.
“It’s not easy and I don’t want people to think it is.
“My life is full of tantrums and tears.”