Olympic champion Jessica Ennis disguised herself as a reporter for Powerade's latest campaign 'You Have More Power Than You Think'.
The heptathlete donned a blond wig and glasses before heading out to Hyde Park with a microphone to interview runners about their training regimes.
One interviewee discovered that he was in fact speaking to Ennis when she unveiled herself by pulling off her wig and introducing him to new training habits.
Ennis became the face of last summer's Olympic Games in London following her gold-medal win in the heptathlon.
