1961 - Born on the 31st of October in Artane, Dublin, Ireland.
1971 - Began taking drumming classes with Ireland's best-known drummer, Joe Bonnie and afterward with his daughter Monica.
1976 - He posted a note on the message board of Mount Temple Comprehensive School in Dublin: "Drummer seeks musicians to form band".
1978 - After forming U2, Mullen's drumming style and techniques began to evolve. At the beginning his contribution to the band was often limited to filling in and adding drum rolls, but as time went on he became more involved in the writing of the songs, particularly in conjunction with Adam Clayton, his partner in the rhythm section. Mullen's drumming is now an integral part of U2 songs and he is credited as being the band's backbone
-Mullen has always been the quiet member of U2, preferring to let the other band members take center stage at press conferences and interviews.
1990 - He is also a big fan of the Republic of Ireland football team for whom he wrote the song "Put 'Em Under Pressure".
1996 - During the recording of the album Pop, he suffered from severe back problems.
- Worked with fellow band mate Adam Clayton on the theme to the film Mission: Impossible.
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