JOHN Lennon's widow Yoko Ono will tell people around the world "to learn to love each other in peace" today as millions of people celebrate what would have been the music legend's 70th birthday.
Fans around the world will be remembering the late Beatle at various locations including his home town of Liverpool and at a shrine in Central Park, New York, his adopted home.
Ono herself will be leading a celebration in Iceland with a series of events, including a performance by the Yoko Ono Plastic Ono Band, alongside their son Sean.
Ono will switch on the Imagine Peace Tower, an illuminated memorial on an island close to Reykjavik. This will remain lit until December 8, Lennon's anniversary.
It is thought that Ringo Starr and George Harrison's widow Olivia may attend.
Lennon was murdered in 1980 by Mark Chapman who is still imprisoned for the crime. He was shot outside his home in the Dakota building, New York, which Ono still calls home.
Liverpool will kick off a Lennon celebration gig weekend tonight at the famous Cavern Club where the band made its name.