Oh man, this is awesome news. I'd say it's just been in the last 6 months to a year or so, but they could've known each other before that. He has a residency at 1M (~kirill's father's club in Chelsea), so maybe she went with Sofi one night and they just hit it off. He can be impulsive sometimes and was probably like "I like your style, let's work together" and it was a done deal.