Marta Sierra, a Spanish model, influencer, and social media personality, is well-known for her colourful and imaginative Instagram contents, which highlights her travel escapades and fashion-forward style.
She has over 1 million Instagram followers, and her unique photo transitions and varied aesthetic have helped her stand out in the influencer market. Sierra, a forerunner in cooperating with large labels such as Zara, also maintains her own website, bymartasierra.com, where she sells Lightroom presets to help others attain her characteristic look, consolidating her influence in both lifestyle and photography.
Marta Sierra Biography
Marta Sierra was born on May 13, 1994, in Barcelona, Spain, where she grew up. Raised by her parents, whose names are not publicly known, she has kept information about any siblings hidden.
She studied biochemistry before earning a master’s degree in Luxury Management in Paris, where she spent a year polishing her creative and business skills. Sierra grappled with anxiety about her height as a teenager, believing she stood out in her class, but she turned these feelings into a passion for photography and fashion.
Her ethnicity is Spanish, and her religion is not officially disclosed.
Career
Marta Sierra started her Instagram account with a selfie on April 6, 2014, and initially kept it private for friends. In 2017, she went public, teaming with her boyfriend, Tom, a law student, to capture her everyday ensembles.
Her imaginative transitions and bright trip images from destinations such as Amalfi, Rome, and Lisbon swiftly gained popularity, including a 2018 photo of her “eating a rainbow” that went viral. By 2021, she had dedicated herself entirely to content creation, becoming a pioneer in wardrobe changeover reels, most notably with a viral film at the Louvre in Paris. Her unique approach distinguished her from other fashion influencers.
Her career took off with ground-breaking brand collaborations, including being the first Spanish influencer to collaborate with Zara for a colorful accessories campaign in Paris, where she had complete creative control.
She has collaborated with businesses such as YolanCris, MAX&Co, Liu Jo, and Amazon. She also served as an ambassador for Joyería Grau’s AURA collection, donning a rare diamond necklace during Tiffany & Co.’s Barcelona shop opening.
Sierra, included among Forbes’ top 100 Spanish content creators in 2023, has been nominated for accolades such as the Ídolo accolades and GenZ Awards for creative content, demonstrating her growing popularity.
Marta Sierra currently has over 1 million Instagram followers and 240,000 TikTok fans, with a concentration on travel, fashion, and optical illusions. She and her husband, Tom, co-create all of their work, allowing them to preserve creative independence without the need for a large team.
Recent X posts from 2025 demonstrate her continued reel creativity and prominence as a forerunner in Spanish influencer culture.
Personal Life
Marta Sierra married her longtime partner, Tom, on June 15, 2024, in Barcelona, capping a 12-year relationship that began in their youth. The couple, who met when Tom was studying law, work closely together, with him documenting her content.
They have no children but have a pet cat named Tommy, who appears regularly in her blogs.
Net Worth
Marta Sierra’s net worth is estimated at $2 million USD. Her income comes mostly from her influencer job, which includes high-profile brand partnerships with Zara, Tiffany & Co., and others, as well as revenue from her Lightroom presets available on bymartasierra.com.
Her modeling career and social media material on Instagram and TikTok, where her entertaining reels get a lot of attention, also help her financially.
Social Media
Instagram: @marta__sierra
Twitter: @martasierra_