Apparently, the Beatles principal isn't even the biggest guest on the record.

Sir Paul McCartney plays drums on the new Foo Fighters album Concrete and Gold.

Related: Dave Grohl Talks Lyrical Inspiration, Shuts Down Adele, Taylor Swift Rumors

“Paul McCartney plays drums on one of our songs,” Grohl told ET Canada. “He’s a pal. We’ve known him for a long time. He’s great. He’s the most wonderful person in the world. He’s a great guy.”

Oddly enough this is NOT the special guest Grohl had previously referred to as “probably the biggest pop star in the world.” Bigger than a Beatle? Now we really are intrigued.

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