The young English striker was first seen in his new number after making a return to club action after the World Cup at the Allianz Arena. It was later confirmed by Manchester United’s Twitter account following their 1-0 defeat.
Rashford takes over the famed jersey from former incumbent Zlatan Ibrahimovic. It was previously worn by the club’s record goalscorer Wayne Rooney for 10 years.
It remains to be seen whether the change from his former No 19 jersey means Rashford will given a more important role in Jose Mourinho’s attack next season.
Rashford revealed his delight at the decision on Instagram, posting a photo of him wearing the jersey with the caption:
‘Wearing the shirt worn by United legends, honoured #MR10.’
United’s squad was boosted by the presence of Rashford and Phil Jones after Mourinho was able to include both England stars following their early return from summer breaks.
Both players were due to be off until midweek, but agreed to come back prematurely to boost numbers. Rashford and Jones made their return to training on Saturday and took part at the Allianz Arena, their final tie before the start of the new season.
Mourinho gave Rashford No 19 in 2016 after the 20-year-old broke through wearing No 39 under Louis Van Gaal.
Rashford joins esteemed company in David Beckham as the only other previous United academy graduate to wear No 10 since squad numbers became fixed in 1993.
Other former wearers of the number include club legends Mark Hughes, Teddy Sheringham and Ruud van Nistelrooy.