Duchess of Cambridge shows her new shorter hairdo at London charity event

New year, new 'do: the Duchess of Cambridge is getting the jump on 2016 with a haircut that's poised to become one of the most popular styles of the coming months.

Catherine has cut several inches off her perfectly-styled chestnut locks, for a shoulder-brushing style.

Much like her outfit choices, which fly off shelves as soon as the designers' details become known, the new "Kate" is likely to be a hit with fashionistas.

She debuted the look with a teal tailored skirt suit by British designer LK Bennett at a London charity event with husband Prince William on Wednesday.

The pair helped answer phones at brokerage firm ICAP, negotiating market trades as part of an annual event that sees the company donate a day's worth of revenue to charity.

The royals found themselves somewhat overdressed, surrounded by staff dressed as witches, Simpson's characters, NBA players, a crayon, and one barelegged gentleman whose high heels rivalled the Duchess'.

Catherine - who's never one to shy away from a spur-of-the-moment sporting contest - and Prince William also partnered up for a game of doubles table tennis against staff, and had a swing at a pinata.