Madonna's caterpillars, Marlene Dietrich's shocked shape, Pamela Anderson's pencil lines and Cara Delevingne's bushy brow: How eyebrows evolved since the 1920s

For more than a century, women have loved fiddling with their eyebrows. Pictured from left: Marlene Dietrich, Audrey Hepburn, Katie Price and Cara Delevingne 

In the 1920s, socialite Clara Bow made her pencil-thin eyebrows a key part of her look. The downwards angle made her appear constantly sad

In the 1930s, eyebrows took on clown-like proportions. Marlene Dietrich was reported to shave all of her brow hair and then use a pencil to redraw the line above her natural brow line, which gave her a shocked look

In the 1950s, eyebrows started to take on much more of a natural look - stars like Marilyn Monroe used pencils to define the shape but largely stuck to what nature gave them 

Audrey Hepburn was one of the biggest brow icons of the 1950s, with her bushy style 

In the 1960s eyebrows were thin and emphasised with a pencil, like Mia Farrow in A Dandy in Aspic

60s style icon Mary Quant also opted for the strong thing brow look 

In the 1970s, women laid off the eye pencil and went for their natural look, with many like Twiggy struggling to overcome the heavy plucking of the 60s 

The 80s were known for the 'power brow', with women like Madonna spearheading the dark and bushy look

Brooke Shields was the eyebrow icon of the 80s 

The 90s saw the return of the tweezers with vengeance - stars like Pamela Anderson relied heavily on their eyebrow pencil to create an arch 

Kate Moss's eyebrows were the aim of many 90s woman 

Gwen Stefani took her brow styling a step further and accessorised hers with facial jewels 

The Noughties saw the rise of the Scouse brow - highly-styled brow that is exxaggerated with heavy pencilling 

Coleen Rooney was one of the early adapters of the Scouse brow 

Kate Middleton goes for a paired down version of the Scouse brow 

In the last few years, eyebrows have become less styled and more generally bushy, as championed by Cara Delevingne 

Actress Lily Collins is also a big advocate of bushy brows 

Model Suki Waterhouse also makes the most of her naturally large eyebrows