Dermot O'Leary will once again host the star-studded ceremony, which will take place at London's O2 on January 23. They will be broadcast live on ITV1.
Watch Dermot O'Leary revealing how to vote:
Celebrating the incredible success of London 2012, a new Landmark Award will be handed to key members of Team GB.
TV fans are also being asked to join in the celebrations by sending their suggestions for the best moments and personal highlights from London 2012 on the NTAs website.
The suggestions will feature in a special film that will be played at the awards.
"Was it Her Majesty the Queen skydiving into the Olympic Stadium James Bond-style, Mo Farah winning the 5,000 and 10,000m, or Ellie Simmonds's triple swimming triumph that made you weep and cheer? This summer saw record TV audiences captivated by Olympic and Paralympic events," reads a message from NTA organisers.
"To pay homage to the UK's greatest Olympic teams in over 100 years, the National Television Awards will be presenting a Landmark Award to key members of London 2012."
The biggest battle at the awards looks set to be in the 'Talent Show' category, which will feature BBC One's The Voice for the first time. It will face stiff competition for the crown from Dancing on Ice, Sky1's Got to Dance, Strictly Come Dancing, Let's Dance for Sport Relief and fierce ITV1 rivals The X Factor and Britain's Got Talent.
Graham Norton, Piers Morgan and Jonathan Ross will be duking it out in the 'Entertainment Programme' category, but will also have to compete with TOWIE and Davina McCall'sThe Million Pound Drop.
Ant & Dec are once again going for the 'Entertainment Presenter' crown and will be hoping to make it 12 years on the trot. However, NTAs host O'Leary, Keith Lemon and Alan Carr will be hoping to steal their crown.
Meanwhile, the 'Drama' category sees Benedict Cumberbatch's Parade's End going up against Downton Abbey, with Scott & Bailey and Lewis among the other contenders.
Viewers can vote for free at www.nationaltvawards.com. Tickets for the ceremony can be purchased from www.the02.co.uk/NTA2013.