Ruth Langsford looked sensational on Wednesday as she took to social media for a very special reason.MORE: Eamonn Holmes stuns fans with incredibly youthful appearance in new photoThe This Morning star, 62, shared a heartwarming video to reveal that she is starting her annual Memory Walk for the Alzheimers Society in memory of her dad Dennis. In the clip, she looked jubilated as she donned a pair of sporty black leggings to cut the ribbon at the start of a previous race.WATCH: Ruth Langsford is gorgeous in her go-to skinny jeans on InstagramCaptioning the post, she wrote: "Delighted to be starting the annual Memory Walk again for @alzheimerssoc on Sunday 2nd October @painshill Park, Cobham, Surrey.