Held in conjunction with Campaign and Media Week, the awards recognise and celebrate the best use of commercial TV.
This year's line-up of 22 judges includes Rebecca Moody, the chief strategy officer at Ogilvy & Mather, Richard Huntington, the chief strategy officer at Saatchi & Saatchi, Jon Wilkins, the executive chairman at Karmarama and Maisie McCabe, the deputy editor at Campaign.
Tess Alps, the executive chair at Thinkbox, will also chair the judging panel.
Manning Gottlieb OMD stole the show at the 2014 awards, picking up five prizes including the Grand Prix for its "putting the play back into PlayStation" campaign, which included adverts that appeared to embed Channel 4 idents into PS4 gameplay, along with a code-breaking competition that encouraged viewers to pause and rewind live TV.
The deadline for entries to the Thinkbox TV Planning Awards 2015 is Thursday 5 March, with the winners announced at a ceremony on Wednesday 1 July.
The five categories are:
Best use of TV in an integrated campaign
Best ongoing use of TV
Best newcomer to TV
Best use of TV sponsorship or content
Best use of TV innovation
More information about the awards and how to enter can be found on the Thinkbox website.