They are among seven UK-based jury chairs at the festival.
Blackett described as 'guardian for 17,000 people and 124 operating brands in the UK' by awards organisers.
The two-day invite-only event will showcase the most innovative work in experiential form across the Palais.
Ascential, the company behind the Cannes Lions International Festival of Creativity, has announced the launch of two new Lions awards and the closure of one other.
Football might not have come home this summer, but creativity did.
Having been left with a headache in the wake of last year's announcement of Publicis Groupe's withdrawal, this year's pared-back festival aimed to dispel some of the concerns surrounding its format.
Jose Papa, who had the job of running the Cannes Lions ad festival for the past two years, is being made redundant by the festival's owner Ascential.
The lack of young people at Cannes reminds us why the advertising industry needs to make more space for a diverse, next generation of talent.
Campaign got candid with brand marketers, creatives and media experts to learn how to craft a compelling campaign
...and that's exactly as it should be, writes Ari Weiss, CCO of DDB North America.
It's funny how closely a week at the Cannes International Festival of Creativity with my toddler mirrored exactly what it's like being a mom in general. It was an amazing, exhilarating, difficult, wonderful, draining, stressful, life-changing experience.
As we detox from Cannes, McCann London's Laurence Thomson and Ross Neil join Campaign's Claire Beale and Gideon Spanier to debate the new-look Festival, what the awards say about the current state of creativity, how Michael Heseltine kicked off Campaign's 50th anniversary celebrations and whether we learnt any more about Martin Sorrell and his plans.
Victoria Fox, outgoing chief executive of Lida, reflects from a marathon session judging this year's Direct Lions in Cannes.
Microsoft Xbox and McCann London won the first Cannes Lions Grand Prix in eCommerce. Campaign speaks to the creative directors about their unconventional approach that turned consumers into designers and marketers.
The impingement of management consultancies means that the Innovation Lions is a category to watch, says Perry Nightingale, executive creative technologist at Grey London and a juror at this year's Cannes Lions.
Sir Martin Sorrell offers WPP some "helpful" advice; a trade website makes an embarrassing accusation, and Keith Weed becomes a magic Twitter moment.
How did KFC go from a crisis that threatened its business to winning at Cannes Lions?
Reduced down to five days, and with fewer awards categories, did this year's Cannes Lions see the event regain its crown as the ad industry's preeminent celebration of creativity?
Trash Isles, AMV BBDO's campaign for LadBible and Plastic Oceans Foundation, scooped awards at Cannes Lions last week. Campaign speaks to the creative team about how they delivered a serious message with a light-hearted approach.
The diversity of work in this inaugural category made judging the winners challenging, says Anthony Svirskis, the chief executive of Tribe.
ABInBev, Apple and Procter & Gamble are among the most-awarded brand owners at this year's Cannes Lions festival, after picking up two Grands Prix apiece.
Barry Lowenthal wraps up the Cannes madness with his key observations from this year's festival.
Among the rose and sunburnt faces on the Croisette, the tech brands upped their game creating experiences to fully engage with the marketing set. Campaign rounds up some of the standouts.
Forget the negative talk about agencies being on the back foot at Cannes Lions 2018. Peter Mears of Havas Group Media left feeling positive, pragmatic and focused on partnership.
James Murphy's airport dash to pick up a prize in a slightly deserted Cannes shows this year's festival was a slightly odd - if improved - affair.
Welcome to Campaign's rolling round-up of this year's UK winners at the Cannes Lions Festival of Creativity.
How does this year's pared-down festival compare to the bloated editions of previous years? Proximity London's executive creative director on where Cannes goes next.
Unilever's diversity and inclusion chief Aline Santos has criticised the industry for a lack of action but welcomed the accountability that has come with a spotlight being shone on the issues.
This year's annual beach party was more special than ever, as Campaign launched its 50th celebrations. We gathered the best of the marketing, creative and tech industries at the Carlton beach to raise a glass with us.
Catch up on all the Grand Prix winners from the 2018 Cannes Lions International Festival of Creativity.
Tide's Super Bowl ad and Procter & Gamble's spot tackling racial bias each won the Film Lions Grand Prix at Cannes.
Abbott Mead Vickers BBDO has been awarded the Glass Lion Grand Prix at Cannes for its Bodyform ad that portrayed period blood in UK advertising for the first time.
Abbott Mead Vickers BBDO and Wieden & Kennedy London were two of only six agencies to win a Titanium award at Cannes Lions this evening.
Abbott Mead Vickers BBDO and Adam & Eve/DDB have each won a gold in the Sustainable Development Goals category at Cannes.
Adam & Eve/DDB has been named Agency of the Year at the 2018 Cannes Lions International Festival of Creativity, it was announced this evening.
adam&eveDDB is named Agency of the Year, and BBDO wins Network of the Year for the seventh time.
Unilever is trialling a new agency model which will see creative agency talent within a holding group integrated into a single team.
Y&R's Saul Betmead on why diversity is crucial for top creativity.
Sir Martin Sorrell regrets not simplifying WPP faster in terms of client-focused work, more country management and making sure this it is underpinned by digital.
A panel session at Cannes Lions titled "Five ads that shook the world" had the surprise inclusion of the by-now notorious Pepsi ad starring Kendall Jenner.
Abbott Mead Vickers BBDO fought off global competition from public relations shops to scoop the PR Lions Grand Prix at Cannes.
Yannick Bolloré discussed the creation of Havas Events and CRM-specialist Havas Helia, as well as the expansion of the Edge Performance Network and the Annex.
Wieden & Kennedy and Nike win Social & Influencer Grand Prix at Cannes for 'Nothing beats a Londoner'
Wieden & Kennedy's "Nothing beats a Londoner" campaign for Nike has won the Grand Prix at Cannes Lions for the inaugural Social & Influencer category.
McCann London picked up the UK's only gold in the Direct Lions at Cannes for "Xbox design lab originals: the fanchise model".
Adam&Eve/DDB was the only UK winner in the Creative Data Lions at Cannes, picking up a gold for its "Gene Project Case Study" campaign for Marmite.
MediaCom and Bartle Bogle Hegarty London have won the Grand Prix in the Media Lions category for Tesco's "Food love stories" and, in what was a strong day for MediaCom, the WPP agency brand was also named the Cannes Lions Media Network of the Year for 2018.
The head of consumer categories talks about the dangers of brands leaning entirely on love.
Consumers are evolving, brands must also - leading marketers from Mars, BT, Disney, Shell, CoverGirl and Karmarama tell how....
Every day during Cannes, industry leaders will serve up their findings straight from the French Riviera -- the good, the bad and the ugly.
KFC's "FCK", the ad from Mother London apologising for the chain's chicken shortage, is one of four UK entries shortlisted for the Titanium Lions - the category recognising game-changers in brand communications.