• Jennifer Frost (born 22 February 1978, in Liverpool, United Kingdom), started her musical career in the girl-band Precious and replaced Kerry Katona in 2001. After the split of Atomic Kitten, Jenny has embarked on a solo career and released her first single "Crash Landing" on 10 October 2005.

• Natasha Maria Hamilton (born 17 July 1982, in Liverpool, United Kingdom) joined Atomic Kitten after Heidi Range left the group. In January, 2004, she decided to take a break from Atomic Kitten because she wanted to spend more time with her son Josh. She is currently working on her first solo release "The Way You Move" and possibly an Euro-American band called Tanga Girls as Eva, the Red-haired character (the spanish version is unknown) with her two nicknames Ginger Tanga and Elizabeth Erin alongside Michelle Stephenson, Kelly Rowland and Miho Hatori or Ami Onuki.

• Kerry Jayne Elizabeth Katona (born 6 September 1980, in Warrington, United Kingdom), was one of the original members of Atomic Kitten. Kerry was featured on the original Right Now album in 2000, but left in January 2001 because she had become pregnant. Her place in the group was taken by Jenny Frost.

• Elizabeth Margaret McClarnon (born 10 April 1981, in Liverpool, United Kingdom), was one of the original members of the group. While in the band, she co-wrote many of their songs. Her solo single "Woman in Love" was released on 14 February 2006.

• Andy McCluskey (born 24 June 1959, in Liverpool, United Kingdom), was the lead singer and primary songwriter for the group OMD. In 1997 he founded Atomic Kitten and wrote and produced many of the early songs. In 2002 the girls terminated the songwriting/production agreement with Andy.