(2005-06) Group formed, consisting of 7 Hello! Project Kids.
(2006-05-06) 1st indie single, Massara Blue Jeans, is released
(2006-06) Kanna Arihana is added to the group, bringing the member count up to 8.
(2006-07-29) 4th and last indie single, Wakkyanai (Z), is released
(2006-10-25) 1st album, Cutie Queen VOL. 1, is released
(2006-10-31) Murakami Megumi unexpectedly announces her immediate graduation from the group. The group now has 7 members.
(2007-02-21) 1st major single, Sakura Chirari, is released
(2009-02) Kanna Arihara begins a hiatus from the group, reportedly to get treatment for/recover from a bunion.
(2009-07-09) It is announced that Arihara Kanna will be leaving °C-ute and Hello! Project permanently, effective immedietely, making C-ute a 6 member group.
(2009-10-25) Umeda Erika graduates from both C-ute and Hello! Project, bringing C-ute down to 5 members.