Brian Douglas Wilson (born June 20, 1942) is an American musician, singer, songwriter, and producer best known for being the multi-tasking leader and co-founder of The Beach Boys. After signing with Capitol Records in 1962, Wilson wrote or co-wrote more than two dozen Top 40 hits for the group. Due to his unorthodox approaches to song composition and arrangement, and mastery of recording techniques, he is widely acknowledged as one of the most innovative and influential creative forces in popular music by critics and musicians alike. In the mid-1960s, Wilson composed, wrote, and produced Pet Sounds, considered one of the greatest albums of all time. The intended follow-up to Pet Sounds, Smile, was cancelled for various reasons, which included Wilson's deteriorating mental health.

As he suffered through multiple nervous breakdowns, Wilson's contributions to the Beach Boys diminished and his erratic behavior led to tensions with the band. After years of treatment and recuperation, he began performing and recording consistently as a solo artist, being inducted into the Rock and Roll Hall of Fame and winning Grammy Awards for Brian Wilson Presents Smile and The Smile Sessions.

On the Beach Boys' 50th anniversary, Wilson briefly returned to record and perform with the group. He remains a member of the Beach Boys corporation, Brother Records Incorporated.

In 2008, Rolling Stone magazine published a list of the "100 Greatest Singers of All Time" that ranked Wilson number 52. In 2012, music publication NME ranked Wilson number 8 in its "50 Greatest Producers Ever" list, elaborating "few consider quite how groundbreaking Brian Wilson’s studio techniques were in the mid-60s.

" He is an occasional actor and voice actor, having appeared in television shows, films, and other artists' music videos. His life was portrayed in the 2014 biographical film Love & Mercy.