Late entries after this deadline will be subject to a £75 penalty fee per entry, which will take the total per entry to £265+VAT.
A late entry deadline has now been set at the 28 June for those wishing to still enter.
The awards will return to the Grosvenor House Hotel, Park Lane on Thursday 25 October and will be headed by co-chairs Jonathan Allan, sales director for Channel 4 and Karen Blackett, chief executive of WPP-owned MediaCom.
Last year's Agency of the Year was PHD while Global Radio picked up the coveted Sales Team of the Year.
Last year's Media Week Awards received a record number of entries and was attended by more than 1,300 people.
This year’s judging panels will include representatives from across the industry including media agencies, media owners and advertisers.
The awards are a truly independent process judged by your peers.
All the details about the awards can be found at www.mediaweekawards.co.uk