Celebrity marketing agency: Strategic brand endorsement

OPEN is the celebrity marketing division of Gust, co-founded with Isabelle Brulier, a recognized expert in image and celebrity relations. We connect brands with the most influential personalities and talents for their business challenges, creating strong, credible, and immediate impact.

+12 years experience
+180% brand awareness
x4 attention vs classic campaigns
+40% positive brand perception
Emma
Campagne d'influence Vestiaire Collective mode éthique gérée par Agence Gust - Exemple UGC
Vertbaudet
Nestlé
CyberGhost
Quick
Parions Sport
Orange
Coca-Cola
NIVEA
O.P.I
Showroom Privé
Emma
Campagne d'influence Vestiaire Collective mode éthique gérée par Agence Gust - Exemple UGC
Vertbaudet
Nestlé
CyberGhost
Quick
Parions Sport
Orange
Coca-Cola
NIVEA
O.P.I
Showroom Privé

Our mission

Leverage our exclusive network of personalities, artists, experts, athletes, and thought leaders managed by Isabelle Brulier to find the perfect match between your brand universe and the talent who can embody it.

Give your brand maximum visibility and a premium image through the cultural power of celebrities. Strategic, tailor-made collaboration with celebrities whose image amplifies yours: events, image campaigns, conferences, masterclasses, or product launches. We also offer influencer marketing and video production services.

01

We think: Campaign design

  • Identification of cultural opportunities & positioning
  • Strategic talent selection (image, values, affinity)
  • Storytelling & activation concepts
02

We connect: Negotiation & contracting

  • Managing relationships with celebrities and agents
  • Contract drafting & legal validation
  • Image/message alignment
03

We produce: Production & distribution

  • Complete management of shoots, videos, events, PR (production)
  • Media amplification & social ads (social media)
  • Impact reporting (visibility, coverage, sentiment)

Your celebrity pack

Scale pack

Ideal for: Positioning the brand as a thought leader

Masterclass: knowledge sharing led by experts or premium influencers
Speaker event: inspiring speech at a seminar, convention, or forum
Business objective: build brand credibility, strengthen trust, generate qualified leads through exclusive content

Results speak for themselves

We don't just promise, we deliver. Discover the impact of our campaigns.

Case study: ShowroomBY x Géraldine NakacheLogo ShowroomPrivé

With its ShowroomBY editions, ShowroomPrivé continues to collaborate with iconic ambassadors to showcase its lifestyle universes: fashion, beauty, home, and travel.

For this 2025 edition, Géraldine Nakache opened the doors to her wardrobe for an exclusive selection.

Campaign

Create an influence & content strategy capable of embodying the ambassador's personality while showcasing ShowroomPrivé's selection products.

Social ads, Instagram, YouTube and CRM

Our expertise

  • Casting, coordination with celebrity entourage
  • Content production
  • Operational management
  • Reporting

15M

impressions

+900

e-commerce site traffic generated

Our case studies

FAQ

Celebrity marketing (or endorsement) is the strategic association of a brand with a recognized public figure (athlete, actor, artist) to transfer their fame and values.

The major difference? The level of fame:
Influencers: Digital stars (TikTok/Insta), niche experts, strong engagement but fragmented audience.
Celebrities: 'Mass Market' stars (TV/Cinema/Sports), transgenerational fame, massive prescriptive power.

A campaign with a celebrity generates on average x4 more attention than a classic ad and increases purchase intent by +30%.
Associating with a celebrity activates 3 powerful psychological levers in the consumer:

1. Instant Credibility (Trust)
The celebrity's excellence in their field (e.g., a Michelin-starred chef for home appliances) immediately validates your product's quality.

2. Halo Effect (Image)
The star's positive values (performance, glamour, sympathy) are mechanically 'transferred' to your brand (+40% positive image).

3. Emergence (Cut-Through)
In an ad-saturated world, a known face stops the zapping. It is the fastest way to make a new offer emerge or reposition a historical brand.
We don't choose a celebrity based on 'gut feeling', but via our 'Celebrity-Match' methodology analyzing 5 strategic criteria:

1. Image Affinity: Value alignment (Luxury, Performance, Family) between the star and your brand.
2. Expertise Relevance: Their field of legitimacy (Sports, Cinema, Fashion) must validate your product.
3. Demographic Audience: Their fan base must match your target exactly (Age, SES, Interests).
4. Reputation Risk: Complete audit of media history to avoid any Bad Buzz.
5. Activation Capacity: We select engaged personalities, ready to be truly involved (not just a 'billboard face').

Thanks to our OPEN division and Isabelle Brulier (+12 years experience), we guarantee access to premium talents.
We orchestrate 5 collaboration formats adapted to your awareness objectives:

1. Digital & Social Media Campaigns: Instagram posts, Stories, TikToks published on the celebrity's accounts to reach their massive community.
2. Events & Public Relations (PR): Physical presence (Product Launch, Store Opening, VIP Masterclass) to attract media.
3. Advertising Production: Creation of TV Spots, Brand Films, DOOH Billboards, or Podcasts embodied by the star.
4. Ambassador Partnerships (Long Term): Annual or multi-year contracts active during all your commercial highlights.
5. Product Endorsement (Co-creation): Development of signature ranges or capsule collections.

Each activation includes complete management: production, coordination with the entourage (agents), and impact reporting.
Activation timelines vary based on celebrity notoriety and project complexity. Here are our standards:

1. Simple activation (3 to 6 weeks)
For a social media post or event presence. Includes: identification, agent negotiation, contract, and logistics.

2. Complete Campaign (6 to 10 weeks)
For content production (shoot/filming) and multi-channel distribution. Includes: creative design, prod, and post-prod.

3. Ambassador Contract (2 to 3 months)
For a strategic annual partnership requiring in-depth legal negotiation.

Expert tip: 'Top-Tier' celebrities require several months of anticipation. Brief us as early as possible to secure the agenda.
We implement a robust contractual framework to protect your investment and brand image. Our contracts systematically include:

Deliverables & Penalties: Exhaustive definition of obligations and sanctions in case of breach.
Image Rights: Precise negotiation of duration, territories, and authorized media.
Sector Exclusivity: Formal prohibition to collaborate with your direct competitors.
Validation (Right of Review): Total control over content before any publication.
Exit Clauses (Bad Buzz): Reputation protection and early termination mechanisms.

We work with specialized lawyers (image/sports law) to guarantee total compliance and clear contractual KPIs.
Yes, marketing studies (Nielsen/Kantar) demonstrate the measurable impact of celebrity endorsement on commercial performance:

Immediate sales: For €1 invested, the average return is €6.80 (long-term ROI).
Assisted awareness: Average increase of +28% post-campaign.
Ad memorization: Ads with stars are 60% more memorized than standards.
Halo Effect (Image): Positive transfer of the star's values to the brand's perceived quality.

Warning: Effectiveness depends 100% on 'Matching'. Poor casting can be counterproductive. Our expertise guarantees this strategic alignment to maximize your KPIs.

Want to associate your brand with a celebrity, organize an event, or an image campaign?

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