Dr. Dre has announced that he's completed a full album with British soul singer Marsha Ambrosius. The superproducer posted a selfie with a studio full of orchestral musicians.

“I just finished recording an album with Marsha Ambrosius,” he wrote. “Casablanco I had a blast!! This is some of my best work!!” Dre worked extensively with Ambrosius on his 2015 Compton album, with the singer appearing on tracks such as “Darkside/Gone” and “Satisfaction.”

Ambrosius also posted a photo wearing a Wu-Tang Clan shirt in the studio with Dr. Dre. And violinist Eric Gorfain also gushed about the project. The recording sessions reportedly took place over the summer.

“The cat is out the bag,” he wrote. “I spent this summer arranging strings for this entire album, reuniting with @drdre and @marshaambrosius.Casablancois seriously good. Marsha is ridiculously good. Dre is The Greatest.”