She recently received a parking ticket as she returned to her blue Audi after a trip to the shops.
But a passer-by ensured Emma Watson, 26, wasn't left too disheartened when he cheekily pinched the notice off her car and refused to hand it over, prompting the star to smile.
The Harry Potter actress was dressed down for the London outing in a striped longsleeve top and washed out New York Yankees cap.
She completed the look with some three-quarter-length leggings, flip flops and a pair of large black shades.
Emma clutched a brown paper bag as she made her way to her vehicle, and as she opened the door she conversed with a man clutching a can of lager in one hand and waving her ticket around in the other.
Looking relaxed, she appeared to ask the man to hand it over as he playfully held it outstretched.
Eventually he decided to hand it over and received a smile and a kiss on the cheek for his troubles by a happy Emma.
The encounter looked to have brightened up her day as she initially remained straight-faced as she sauntered along the street.
Earlier in the day, a parking warden could be seen taking pictures of her car before placing the notice underneath the windscreen wiper.
Emma's brown bag has the name Cowshed on it, which sells "natural bath and body products containing only the very best organic, wildcrafted and fairly-traded plant extracts and essential oils."