Drake and Chris Brown's new friendship is strictly professional.

The long-time rivals, who have both had on-again, off-again relationships with Rihanna, sparked rumours they had buried the hatchet this week after a photograph of them in a recording studio together appeared on Instagram.

But a source told gossip website TMZ.com that the duo made a business decision to put their differences aside, as they believe they can make millions by teaming up together.

The insider revealed that Drake, 27, has signed on to produce Chris' upcoming album, and is collaborating with him on several tracks.

They believe the album will be a huge hit because fans will want to pick apart the lyrics and compare their vocal abilities.

Another source told HollywoodLife.com: ''[Drake] will work with anyone in the biz if he thinks the collab has the potential to be epic.''

When asked about the image of them together on Friday (11.07.14), Drake hinted things are still frosty between him and Chris by saying he would ''rather not comment.''

Tension between the pair erupted into a violent fight in New York City nightclub W.I.P. in 2012, leaving several people injured.

The 'Started From The Bottom' hitmaker also claimed last year that he would never be able to talk to Chris.

During an interview, he said: ''I wish we could sit down, just like you and me are right now, and talk it out man-to-man. But that's not going to happen.''