Molly Mulvihill, 11 braved the scissors at Harington's salon in Queen Street, Maidenhead on Friday.
She had seven inches of her hair carefully plaited - then cut off by stylist Lisa Foreman.The plait has been sent to the Little Princess Trust, which makes wigs for children who have lost their hair because of cancer treatment.
Molly's mum Caroline, dad Neil and sister Niamh, eight, were there to support her. Once Molly had got over the shock of losing her newly plaited hair, stylist Lisa transformed what was left into an attractive 'graduated bob'.
Molly, who lives at Belmont Crescent, Maidenhead, said: "I quite like it. I was not sure at first but mum says it makes me look quite sophisticated - I feel 13 now."
Mum Caroline said: "I think she looks lovely. She wanted to up her coolness factor for senior school and it has done that."
Meanwhile proud dad Neil did a quick check that revealed Molly had already raised £729 on Just Giving.That will go towards the charity Ovarian Cancer Action.
Molly's best friend Tommy's mum Shelley Hand was diagnosed with the illness and is herself a dedicated fund raiser.
Molly is head girl at Furze Platt Junior School, Furze Platt Road. You can contribute to her fund raising efforts by visiting justgiving.com/Caroline-Mulvihill1.
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The victim of an assault in Cippenham was flown to hospital by air ambulance this afternoon.
A rapid response vehicle, an ambulance officer, an air ambulance and an ambulance crew were all called to an address in Earls Lane at 2.10pm.