The night before her 30th birthday, Kate attended the War Horse film premiere with William. The two were walking the red carpet in aid of The Royal Foundation, the charity which benefited from the evening. Among the guests were servicemen and women invited from the various regiments in which William has served or holds a commanding rank, including RAF Search and Rescue and the Irish Guards. The day before, Kate had announced the first four charities of which she would be Royal Patron.