Johnny McDaid promises Harry Styles' solo music will shock fans

One Direction star Harry Styles' solo music will drive his fans crazy.

Johnny McDaid, who has been writing songs with Styles' for years, said the British musician's solo songs will "blow the socks off the world," reported Aceshowbiz.

"I've been friends with Harry for a long time, and we've written together a lot. Harry is a really prolific artist and a super-talented guy. He's really authentic and he has an incredible voice, so we've been writing a lot of songs. We've been writing songs for years together."

"I'm really excited by the way he's sounding at the minute, he's such a talent. I think the world is going to be really shocked at what he comes up with... It'll blow the socks off the world," the Snow Patrol member said.

Styles, 22, registered four new songs with the performing rights organisation ASCAP last year. The songs that feature McDaid as co-writer, include "Already Home", "Coco", "Endlessly" and "5378 Miles".

The singer, who will be making his acting debut with Christopher Nolan's upcoming World War II movie, recently cut his signature long hair for a role.