Jessica Biel says parenting is `the hardest job in the world`

London: Actress Jessica Biel finds motherhood an amazing experience but says being a parent is "the hardest job in the world."

The 33-year-old "Total Recall" star, who has five- month-old son Silas with husband Justin Timberlake, thinks her little boy is "wonderful," reported Female First.

"He's wonderful. He's just a joy. It's an amazing, amazing experience. (Parenting) is incredibly hard, the hardest job in the world and I've never been more thankful and grateful to my own mother.

"I'm going to call her right after this actually and just thank her. What you have to do for your kid, it's an amazing responsibility and the biggest joy ever."

Biel, is also grateful to "Mirrors" hitmaker Justin, 34, for getting up in the middle of the night to feed and take care of Silas.