A1 is a British–Norwegian boy group formed in 1998. The original lineup consisted of Paul Marazzi, Christian Ingebrigtsen, Mark Read and Ben Adams. Ingebrigtsen is originally from Oslo, Norway, while the other members originate from London.

Paul Thomas Leo Marazzi is an English musician. He is the oldest member of the boy band A1. Marazzi was the first to join A1, a British/Norwegian boy band whose first single, "Be the First to Believe", was released in 1999. Together with Marazzi were Britons Mark Read, Ben Adams, and Norwegian Christian Ingebrigtsen. They were formed by band manager Tim Byrne, who also formed Steps, and signed to Columbia Records by A&R manager Fran de Takats. A1 won a BRIT Award for "British Breakthrough Act" in 2001. Their third album, Make It Good, featured a sound closer to traditional rock music, but was to be their last studio project with Marazzi.