The superstar musician was spotted outside the BBC Radio 1 studios in the capital this morning (5 February) and was looking as stylish as ever in a navy blue coat with a thick and cosy grey collar.
He also wore a spotted jacket underneath his coat, some sturdy boots and a pair of dark denim jeans.
However, we couldn't take our eyes off his now-famous headgear.
Pharrell, 40, caused quite a stir last month when he attended the 56th Annual Grammy Awards in LA and walked down the red carpet wearing the eye-catching vintage Vivienne Westwood hat.
Twitter immediately went into a frenzy and in the days that followed, the chart-topping singer even decided to release a spoof of his hit single 'Happy' called 'Hatty', featuring the giant accessory.
And since his hat has gained so much attention across the world, Pharrell has clearly been persuaded to purchase another one, this time in grey.
Accompanying the 'Get Lucky' star and his massive grey hat to the BBC studios today was model and fashion designer Helen, who married Pharrell in Miami last October.
She kept her ensemble casual and effortlessly cool and coordinated with her hubby by sporting a hat of her own - although it wasn't quite on the same scale as his!
The couple have a son together, 5-year-old Rocket Man Williams.
What do you think of Pharrell's hat? Let us know below, as the best comment from across the website each week wins £50!
Watch his spoof video for 'Hatty' below.