Marcus Rashford celebrates England Under-21s debut hat-trick with Instagram post of a football and his two dogs

MARCUS RASHFORD took to Instagram to celebrate his England Under-21s debut hat-trick.

The Manchester United hitman posted an image of a football in between two dogs — thought to be his and his brother’s.

Rashford’s took home the match bakk for the treble he struck against Norway U-21s — along with the caption: “Growing up fast” — has so far garnered nearly 60,000 likes and over 250 comments.

Despite playing his way in Roy Hodgson’s doomed Euro 2016 squad, the striker had never featured for the young Lions before.

It now means he marked his incredible rise with goals on his first Europa League, Premier League, Manchester derby, England and Under-21s appearances.

Rashford opened the scoring just before the half hour mark, before goals from Nathaniel Chalobah and Ruben Loftus-Cheek but Gareth Southgate’s kids in the driving seat.

The 18-year-old United ace netted again just a minute later and, after Norway had pulled one back, netted his third from the penalty spot.

Lewis Baker completed the rout four minutes from time.

Rashford scored his first goal of the season — a dramatic last-minute winner against Hull — in his first league appearance under Jose Mourinho.

On Saturday, he is likely to feature in his first-ever Manchester derby at Old Trafford.

Mourinho has been reluctant to use the starlet this season — preferring to start Anthony Martial alongside Wayne Rooney and Juan Mata in behind Zlatan Ibrahimovic.

But, with the Frenchman struggling to recapture last season’s dazzling form, don’t be surprised to see man-of-the-moment Rashford handed his first league start of the season.