Willow Smith finally acts her age by falling asleep on her dad's kneeJada Smith/Twitter

What with whippin' her hair for the cameras and showing off a (thankfully fake) tongue piercing, you would be forgiven for thinking Willow Smith was 22, not a pre-teen 11-year-old.

So we were very pleased to see this gorgeous picture on Jada Smith's Twitter page, which shows Willow acting her age and enjoying a cuddly snooze on dad Will Smith's lap during a flight on a private jet.

Willow's mum Jada tweeted the shot with the message: "Being a fatherless daughter these are the moments I cherish. Love J."

Jada was brought up by her single mum after her dad Robsol Pinkett left her at an early age.

Will and Jada also have a son, Jayden, 14, and Will has 18-year-old son called Trey from a previous marriage.