Stephanie Demner Biography: Net Worth, Height,Age, Partner, Daughter, Movies, Awards, Model, Education, YouTube

Stephanie Demner is a prominent Argentine model, social media influencer, and entrepreneur who achieved widespread recognition through her work in high-fashion advertising and her digital presence.

She first reached a high level of public visibility as a teenager when she was selected for major national modeling campaigns for global brands, establishing her as a sought-after face in the Argentine fashion industry.

Profile

• Full Names: Stephanie Demner
• Date of Birth: March 23, 1991
• Age: 34 years old
• Gender: Female
• Place of Birth: Buenos Aires, Argentina
• Nationality: Argentine
• Profession: Model, influencer, and entrepreneur
• Height: 1.72 meters
• Weight: 55 kg
• Eye Color: Blue
• Hair Color: Blonde
• Parents: N/A
• Siblings: N/A
• Spouse: N/A
• Children: Arianna Pella
• Relationship Status: In a relationship
• Religion: Roman Catholicism
• Ethnicity: White (Hispanic)
• Net Worth: $4 million

Early Life and Education

Stephanie Demner is now at the age of 35 and was born on March 23, 1991, in the city of Buenos Aires. She grew up in a residential neighborhood of the capital, where she displayed an early aptitude for performance and modeling. She began her career in fashion at the age of 14, balancing her studies with professional photo shoots and auditions.

She attended the University of Belgrano in Buenos Aires, where she pursued a degree in Management and Institutional Communication.

She graduated in 2012, majoring in Communication, a field that provided her with the theoretical foundation to eventually manage her own brand and digital image.

Personal Life

In 2012, Stephanie Demner was in a relationship with tennis player Juan Martín del Potro, followed by a high-profile relationship with comedian and influencer Grego Rossello from 2016 to 2017.

In 2018, she began a relationship with professional tennis player Guido Pella. The couple became engaged in 2019 during a trip to Disneyland, a place that holds significant meaning for the influencer.

In July 2022, Stephanie and Guido welcomed their first daughter, Arianna Pella.

Throughout 2024 and 2025, the couple has shared numerous milestones of their family life with their followers, often traveling internationally for both professional and leisure purposes.

Although they have referred to each other as partners for many years and have planned a wedding, they have not yet held a formal civil or religious ceremony as of late 2025.

She is widely recognized for her “mami-influencer” content, balancing her professional commitments with her role as a mother.

Career

Stephanie Demner began her professional journey as a runway and campaign model for agencies like Multitalent Agency.

She was the face of numerous brands including Swatch, Coca-Cola, and various Argentine fashion labels.

As Instagram gained popularity, she shifted her focus toward digital content, becoming one of the first “professional influencers” in Argentina.

This transition led to the founding of her own beauty and makeup brand, Serendipity, which has become a significant commercial success with distribution across the country.

In 2024 and 2025, her career expanded further into the travel and lifestyle sector. She launched a successful series of organized group trips to Disney World, known as “The Disney Trip,” where she acts as a host for hundreds of followers.

She has also maintained long-standing contracts as a global ambassador for brands like Pandora and various luxury skincare lines.

Her business model is frequently cited in marketing seminars as a prime example of successful personal branding and audience loyalty in the digital age.

Awards

• Los Más Clickeados Award for Influencer of the Year (2018)
• Martin Fierro Digital Award for Best Lifestyle Content (2019)
• Influencer of the Year – Argentina (E! People’s Choice Awards Nominee, 2020)
• Influencer Icon Award (2023)

Net Worth

Stephanie Demner has an estimated net worth of $4 million. Her wealth is the result of her multifaceted career, including high-paying endorsement deals with international luxury brands and the substantial revenue generated by her company, Serendipity.

Social Media

• Instagram: @stephaniedemner
• X: @stephaniedemner
• TikTok: @stephaniedemner
• YouTube: @StephieDemner

Filmography

• The Challenge Argentina (2023)
• Bailando por un Sueño (Guest Appearance, 2017)
• Casi Ángeles (Small Role, 2010)