Ashlee Simpson has posted a candid picture of herself planting a big kiss on her four-month-old son on her Twitter page.

Jessica's little sister and her husband Pete Wentz welcomed their first child,  Bronx Mowgli, on November 20 last year.

And today the 24-year-old singer posted the picture of her little boy, with message saying: "i present you my little man and his adorable cheeks!"

We think little Bronx is got an impressive pout going on there too.