Billie Piper's fans did a double take as she posed with her lookalike younger sister for a shoot.
The actress, 36, was a guest editor for Stylist's October issue and her sister Elle, 26, starred in a series of stunning photos to help out in a "How To Wear Pink for Autumn" shoot.
Elle looked just like her famous older sister as they both looked similar with their plump pout, strong jawline, dark hazel-green eyes and blonde waves.
And of course, the sisters were pictured wearing pink items of clothing.
Her fans couldn't get over their shock striking resemblance as they praised the girls for being "pretty" and gushed it must run in the family.
One fan wrote: "QUEENS. You both look incredible."
Another said: "You are both so pretty."
Unlike Billie, younger sister Elle hasn't stepped into the spotlight.
The blonde beauty has a shared love of fashion as shown on her Instagram but she seems to keep a low-key profile by not posting much on social media.
Elle goes by the name Pippy on social media and fans can't believe how much she resembles her older sibling.
As part of Billie's work with Stylist , she wanted to show readers the face behind her make up after becoming frustrated that women are not represented "in a raw and real way".
Recently, she revealed to the magazine that she was initially afraid of having a daughter who would be brought into a "man's world".
The star said she was "always worried" about having a daughter.
“I was delighted and relieved, frankly, when I knew I was having boys. And I've adored having sons,” she explained to the magazine.
“I have been constantly surprised by them - how emotional, sensitive and thoughtful they are.”
The Doctor Who actress has two sons with her ex-husband actor Laurence Fox.
Winston James was born in October 2008 and Eugene Pip was born in April 2012.
* The full interview appears in this week’s issue of Billie Piper takes over Stylist.