Sir Paul McCartney, 61, cuts a casual figure in navy blue shirt and matching shades

He’s one of the most famous music icons in the world.

So onlookers may have been surprised to see Beatles legend Sir Paul McCartney, 79, and his wife Nancy Shevell, 61, leaving London’s Euston Station on Monday.

The rocker cut a casual figure in a navy blue T-shirt and a pair of dark jeans as he left the rail terminus in the capital.

On the run: Beatles legend Sir Paul McCartney, 79, cut a casual figure in a navy blue T-shirt and dark jeans as he left London’s Euston Station on Monday

He had a dark blue jacket over his T-shirt and the shade of his glasses lenses perfectly matched his attire.

Sir Paul wore a comfortable black pair of trainers as he walked along the street.

The star was greeted by fans on his return from Liverpool who were keen to get a picture with him and an autograph.

Coupled-up: The musician arrived back from Liverpool with his wife Nancy Shevell, 61, (pictured) who wore a comfortable top and jeans and carried a colourful back full of belongings

Sir Paul’s wife Nancy, who he married in 2011, wore a lightweight green jumper and a pair of blue denim jeans.

She had a black coat over her top which matched her flat shoes, while she carried a colourful bag full of belongings in her hand.

The couple were recently spotted in Sir Paul’s home town of Liverpool with Sir Paul’s daughters, photographer Mary, 52, and fashion designer Stella, 50, both from his relationship with Linda McCartney.

Homecoming: The couple were spotted in Sir Paul’s home town of Liverpool with his daughters Mary, 52, and designer Stella, 50, both from his relationship with Linda McCartney

They toured the city’s famous Lime Street station before queuing up for a trip to Nowhere, Man at a bus stop in Heswell, on the Wirrall.

Local resident Colin Newitt told the Liverpool Echo after sighting the family: ‘So we had been to Parkgate for a meal with our son Mason when I heard my wife shouting “look there’s Paul.” He shouted back “You alright.”

‘I then told him that I went to the same school as him. He asked me which one and I said Liverpool Institute. He asked me who was my teacher and said I can’t remember but that Mr Parker was the head.

Family affair: They toured the city’s famous Lime Street station before queuing up for a trip to Nowhere, Man at a bus stop in Heswell, on the Wirrall

‘The lights then changed and we had to go. I shouted “See ya” and he waved goodbye. He had just got out of a car with his daughter Stella.’  

Sir Paul’s appearance comes after he paid tribute to Rolling Stones drummer Charlie Watts after his death aged 80 in August.

Sharing a video on Twitter, Sir Paul addressed his followers in the candid clip, hailing Charlie as ‘a rock’ and ‘fantastic drummer’ before revealing: ‘I knew he was ill, but I didn’t know he was this ill.’

Charlie’s death was confirmed shortly before Beatles rocker Paul released his clip, with a statement confirming he had ‘passed away peacefully in hospital surrounded by his family’.

Good friend: Sir Paul’s appearance comes after he paid tribute to Rolling Stones drummer Charlie Watts after his death aged 80 in August