The 53 year old shared a snap with Lexi, 18, to mark the moment and penned an emotional message to her eldest daughter.
Fans also gushed over Lexi’s milestone as one person said: "How proud you must be of lovely Lexi, if you are her template then my word is she going to be just fine, beautiful inside and out." Over a snap of the trio donning pretty floral dresses, the TV star wrote: “Our girl has finished school forever! Uni next. We could not be prouder of our gorgeous girl.”The 12-year-old sat alongside judge Simon Cowell's son Eric during the last series of Britain's Got Talent, with the two youngsters even running onto the stage to hit the golden buzzer for act Haribow's audition.