Mount, 22, spotted young Belle in the crowd as he was walking around the pitch with his friend Declan Rice. He quickly brushed past security and hopped the barrier to hand the young fan his match-worn England shirt, with a big smile on his face.
Belle then burst into happy tears after this surreal moment, and later described the “crazy moment”.
“I’m going to frame it. I don’t want to sell or wash it,” she said.
“I didn’t realise until the last moment because when he walked over, he was coming in my direction but he was looking the other way so I didn’t expect it.
“When he came over and stood right in front of me, that’s when I finally realised I had it in my hands and it was just crazy.”
Her father Tommy revealed they had been trying to attract the Portsmouth-born player’s attention before the game had even kicked off.
“She’s small but very mouthy and was shouting ‘Mason Mount’ as he was warming up and she managed to catch his eye in the warm up and he saw her flag so luckily made an impression and was hoping after the game ended, maybe she’d catch his eye and be the lucky recipient of the shirt.
“The plan worked perfectly and to be honest we’re still in dreamland. It’s just been crazy.
“Since the game, we haven’t come down to earth.”
And Mount’s latest message to the duo certainly won’t help in bringing the whole family back down to earth.
Appearing on ITV’s This Morning show, Presenters Phillip Schofield and Holly Willoughby showed the pair a special message that the England International sent into the show.
Mount said in the video message: “Hi Belle, it’s Mason here. I just wanted to do this message for you and say how special your reaction was after the game when I gave you my shirt.
“Obviously we won the game and that was a big achievement, but that really topped it off for me.
“It made it even a special night for me. Thank you for all your support- it really means a lot to me.
“And hopefully see you Monday.”
A message which made Belle cry once again in disbelief and shock that her idol Mount reached out to her personally for the second time- once in the stadium, and now over message.
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After seeing that message on the ITV show, Tommy responded to the Chelsea midfielder saying thanking him for everything he’s done for his daughter.
He said: “Thank you so much Mason. Honestly, I just want to thank him for that.
“We can’t put into words what he’s done for her. He’s such a nice man.”