Jessica Ennis-Hill of Great Britain competes in the Women's Heptathlon Javelin Throw on Day 8 of the Rio 2016 Olympic Games at the Olympic Stadium on August 13, 2016 in Rio de Janeiro, Brazil.

Jessica Ennis-Hill of Great Britain, Antoinette Nana Djimou Ida of France, Katerina Cachova of the Czech Republic and Nadine Visser of the Netherlands compete in the Women's Heptathlon 100 Meter Hurdles on Day 7 of the Rio 2016 Olympic Games at the Olympic Stadium on August 12, 2016 in Rio de Janeiro, Brazil.

Jessica Ennis-Hill of Great Britain reacts in the Women's Heptathlon Javelin Throw on Day 8 of the Rio 2016 Olympic Games at the Olympic Stadium on August 13, 2016 in Rio de Janeiro, Brazil.

London 2012 - Jessica Ennis is overjoyed after winning gold in the heptathlon with a stunning victory in the final event, the 800m.

London 2012 - Britain’s Jessica Ennis throws the shot put during the women’s seven event heptathlon.

London 2012 - Team GB golden girl Jessica Ennis celebrates winning gold in the Heptathlon with a stunning 800m victory.

London 2012 - a hug from a rival for heptathlon gold medallist Jessica Ennis of Team GB.

London 2012 - Jessica Ennis breaks the pain barrier to take first place in her final heptathlon event, the 800m, in front of an ecstatic home crowd of 80,000 in the Olympic Stadium. Ennis, the face of the Games, won gold overall.

London 2012 - Team GB's heptathletes, gold medallist Jessica Ennis and Katarina Johnson-Thompson, are interviewed. In the background is surprise long jump gold medallist Greg Rutherford of Britain.

London 2012 - Jessica Ennis comes from behind to spring to 800k victory in the final event of the heptathlon in front of an ecstatic 80,000 home crowd. Ennis took gold overall.