The 18-year-old aBBC Radio 1 studios, where he was co-hosting The Breakfast Show with friend Nick Grimshaw, the morning after spending the night with Brady.
“Nothing actually happened between them that night - there were too many people about. But there was some pretty serious flirting going on,” the sun.co.uk quoted a source as saying.
“She accompanied Harry and Nick to Radio 1 to do their show. Harry gave her a tour of the studio but then Millie had to go to work. She is being very coy about it all but she has told friends she is going to see him again,” the source added.