Who's Joe Fox? That's one of the biggest questions circulating right now in hip-hop. The singer is featured heavily on A$AP Rocky's newest endeavor, At. Long. Last. A$AP. The rapper sat down with Hot 97's Ebro in the Morning to speak on his budding working relationship with Fox, whom he met on the streets of London.

"I met the man. He was a street performer. [I met him in] London. I was at Dean's Studio until 4 a.m. I came outside and we waiting for our Uber to go to Starbucks, tired. This kid comes with his guitar and stuff. He was out there playing and stuff and he comes," Rocky explained of his first encounter with Fox. "It was about 4 a.m. so there's nobody in the streets. He tried to give me a CD and s---. I was like, 'I'm not about to listen to that, man. Play something. You got your guitar.' He played it and I was just like, 'Stop man. Come on let's go.' That's where it started."

The affable Rocky even took Joe Fox in and now the two are homies and roommates all at the same time. "We did the album -- pause -- we live together. That's the homie, he's one of the brothers," the MC disclosed.

When asked if Fox was signed to him, Rocky said, "He's the homie, man. He's an artist. That's it."

Fox has commanded much attention for his numerous collaborations on Rocky's sophomore album including the album opener "Holy Ghost" and "Fine Whine." The first time he teamed up with "the rocker guy" it was to record the knocking track "Max B." The London upstart is certainly on everyone's radar and definitely bolstered his resume by working with one of the hottest rappers out right now. As for how Joe Fox feels about all of his newfound fame: "It's very cool."

Watch Joe Fox and Rocky discuss linking up above.