MANCHESTER UNITED duo Alejandro Garnacho and Kobbie Mainoo have emulated a Red Devils legend.

The pair both found the back of the net in the first half of today’s FA Cup final between United and neighbours Man City as United lifted the trophy.

Kobbie Mainoo and Alejandro Garnacho both scored for Man Utd in the FA Cup final today

Both Garnacho and Mainoo are 19 years old, making them the first teenagers to net in an FA Cup final for 20 YEARS.

The last teen to score in the historic competition’s final was Cristiano Ronaldo in 2004 – a fellow Man Utd star.

Ronaldo opened the scoring that day at the age of 19 as United went on to beat Millwall 3-0 at the Millennium Stadium in Cardiff.

And Man Utd fans have been left stunned by the incredible fact – with many hoping it’s a sign of things to come for Mainoo and Garnacho.

On social media one fan wrote: “This is so nuts!”

While another added: “The future is scary, but not for Manchester United.”

A third commented: “Carrington has done it again.”

And a fourth chimed in, writing: “We only breed generational talent around here.”

Cristiano Ronaldo was the last teenager to score in an FA Cup final before Mainoo and Garnacho

Ronaldo’s record was held for so long that neither Garnacho or Mainoo were born when the Portuguese superstar set it in 2004.

But their age wasn’t evident when they both took full advantage of their opportunities under the arch this afternoon

Both rising stars showed they have a calm head on their young shoulders and they tucked the ball away and gave Erik ten Hag’s team a crucial two-goal cushion.