Kate and Oliver Hudson pose with fans in Santa Monica

They are both rocking hairdos that make them virtually unrecognizable.

And yet somebody clearly spotted Oliver and Kate Hudson as they hung out in LA on Friday.

The siblings happily jumped in for photos with delighted fans in Santa Monica.

Family portrait! Siblings Oliver and Kate Hudson posed for pictures with fans in Santa Monica on Friday

Family portrait! Siblings Oliver and Kate Hudson posed for pictures with fans in Santa Monica on Friday

They had managed to pick out 38-year-old Kate despite her new cropped looked, which she adopted to appear in Sia's directorial debut, Sister.

She wore a long black and white maxi dress with a battered denim jacket and shades.

While her feet modeled a pair of white slides, in her hand carried a pair of black Nike trainers, suggesting she was heading to or coming from from somewhere a little more physically demanding.

Oliver, 41, meanwhile was dressed super casual in shorts, T-shirt shades and a baseball cap.

Cropped: They had managed to pick out 38-year-old Kate despite her new cropped looked, which she adopted to appear in Sia's directorial debut, Sister

Cropped: They had managed to pick out 38-year-old Kate despite her new cropped looked, which she adopted to appear in Sia's directorial debut, Sister

Sporting long curling hair and a face full of fuzz, he strongly resembled his dad Kurt Russell — even though Kurt Russell is not his biological father.

Both her and his sister came from mom 's second marriage to musician Bill Hudson.

Bill and Goldie married in 1786 but filed for divorced just four years later, when Oliver was

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