Mark Ronson says Lady Gaga's upcoming album is "pretty deep." The hitmaker, who worked on most songs on Gaga's new record and is likely its executive producer, raved about collaborating with the superstar in a new interview with Buro 24/7's Tracy Phillips.

"I went in on the first day with very open expectations," Mark recalled. "I didn't know if we would work together for two weeks or six months. I knew she was very talented, I'd seen her perform and knew how seriously she takes music. She's really a muso at heart, and is happiest when she's sitting behind the piano yelling out chord changes to the drummer or whatever. But we started working and it kind of exceeded any expectations of what I thought the music was going to be like."

Related: Lady Gaga Shares Details About Dance Floor Anthem 'Perfect Illusion'

He continued: "It's been one of my favourite records to work on and some of the people who have come in to play on it are my favourite musicians, writers and some of her favourites. I think it's just really good music and probably a record for people who might not have realised that her music had something for them — at least based on the small amount of people who've heard it so far. It's definitely pretty deep musically for sure."

Earlier this week, Lady Gaga announced that the lead single from the yet-untitled album is called "Perfect Illusion" and will be released in September. The track was co-produced by Gaga, Ronson, Bloodpop, and Kevin Parker.