The 17-year-old and the German model, who previously appeared together on the front cover of Miss Vogue in late 2015, were spotted enjoying each other's company following an Elton John concert at the Roundhouse in Camden, London.
Adrienne appeared on the front cover of Miss Vogue with Brooklyn in 2015
Adrienne, 18, had an interview with Vogue in late 2015 where she described herself as never having been a "party girl," and saying she was "low maintenance" when it comes to her beauty regime. She also revealed that she didn't "have time" for a boyfriend.
Speaking about her hectic career, she said: "Amid all the excitement, it sometimes becomes very real how far away from home you are. I don't have time for a boyfriend.
"Sometimes I wish I did, but right now I'm focusing on my work and planning a holiday. Come New Year's Eve, I'd love to be on a beach in Australia with my best friend."
Brooklyn and Chloe split in early September
Brooklyn was reported to have split with Bad Neighbours 2 actress Chloe back in early September, with the New York Post revealing that they had ended their relationship quietly several weeks earlier after spending the summer in L.A. together.
Chloe had previously opened up about the pressures of their relationship, telling Glamour magazine: "Seriously, you don't know how often I'm just described as 'his girlfriend'. And you think, 'Well, I've also been acting for 13 years, but don't worry.'
"One of the reasons why dating him is great is that we both get what it means to have our lives twisted and torn apart and faked," she continued.