Grandma in leopard print leotard supports London Marathon with megaphone and dance.

A grandma in a leopard print leotard, wielding a megaphone and boom box, has become a viral sensation for her energetic support at the London Marathon. Dancing and playing a reworked version of "Pump up the Jam," the woman cheered on runners for over five hours near Island Gardens station. Social media users shared videos of her enthusiasm, with the crowds and nearby pub revellers joining in the fun.