(NewYork1/CNN) - John Lennon's wife is now officially credited with helping to write one of the late singer's most popular songs.
The National Music Publishers Association announced Wednesday that Yoko Ono will receive a co-writing credit on the 1971 song Imagine as part of the organization's centennial song award.
During the announcement, a clip of an interview with Lennon from 1980 was played in which he said credit for Imagine should be shared with Ono because he took the concept and the lyric from her book Grapefruit.
Ono and Lennon's son Sean posted a photo with his mother from the event, calling it "the proudest day" of his life.
Ono, now 84-years-old, was married to Lennon from 1969 until he was shot and killed in 1980.
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