What defines the perfect modern woman’s wardrobe? It’s clothing that boasts impeccable quality, a flawless fit, and effortless elegance. This philosophy of relaxed yet upscale LA style is the very foundation of the fashion brand Favorite Daughter, launched by the famous sisters Erin and Sara Foster. For more on how these Hollywood kids-turned-entrepreneurs transformed their closet essentials into a multi-million-dollar commercial success, keep reading with losangeleska.
Meet the Founders: Erin and Sara Foster
Born and raised in Los Angeles, the sisters are the daughters of legendary music producer David Foster and former model Rebecca Dyer.
Sara is the older sister. Both Erin and Sara have a half-sister, Amy S. Foster (from David Foster’s first marriage)—a Canadian songwriter and author—as well as a younger sister, Jordan.
Sara Foster: Actress and Entrepreneur
Sara made her debut in the 2004 action-comedy film, D.E.B.S. Following that, she landed several roles in productions like The Big Bounce, Entourage, Crossing Jordan, and CSI: Crime Scene Investigation. In 2010, she starred alongside Michael Biehn in the horror film Psych:9.
In 2009, Sara began a recurring role as the alluring and trouble-making Jen Clark in the teen drama series 90210.
Erin Foster: Writer, Producer, and Comedian
Erin started her acting career in the early 2000s, appearing in popular series such as Castle, Guiding Light, House, American Dreams, Gilmore Girls, Reno 911!, CSI: Crime Scene Investigation, Judging Amy, and Roswell. She later transitioned behind the camera, focusing on writing and producing.
For example, in 2012, she served as a staff writer for the NBC sitcom The New Normal. More recently, Erin created the hit romantic comedy series Nobody Wants This for Paramount+. She wrote the script and co-executive produced it. When Netflix acquired the international rights in 2024, the show exploded, hitting number one among English-language series that year. A second season premiered in October 2025, and a third season has already been announced.
Creative Partnership: From Parody to Podcast
In 2015, the sisters teamed up to create Barely Famous, an American parody of the reality TV genre for VH1. The first season, consisting of six episodes, premiered on March 18, 2015, with the second season following on June 29, 2016.
The Fosters stated in a press release that they were influenced by shows like The Larry Sanders Show, the British sitcom Extras, and The Comeback. Barely Famous was a scripted reality show that followed the famous sisters, featuring them playing exaggerated, satirical versions of themselves as they navigated absurd and entertaining situations.
The sisters also regularly discuss their careers and family dynamics, including their famous father, on their popular podcast. You can watch a clip from an episode of “The World’s First Podcast” where the sisters candidly discuss parenting and dealing with the spotlight.
From 2017 to 2020, the sisters held co-head creative roles at the dating app Bumble. This experience in the tech world proved invaluable, teaching them strategic thinking and how to engage with a massive audience—skills that would later become crucial for building their fashion brand, Favorite Daughter.
Since 2021, Erin and Sara Foster have hosted their podcast, The World’s First Podcast, where they candidly discuss life, relationships, and the issues modern women face. This platform has been the perfect focus group for gathering real feedback and understanding what women truly want in their closets. This focus on real-life issues is clear in this interview from The Skinny Confidential podcast, where the sisters talk about how to bet on yourself and manage your emotions. The podcast creates an intimate, relatable community that listeners can’t help but want to join.
The Sisters’ Personal Lives
Sara Foster was engaged to actor Ashley Hamilton in 2000, but they separated a year later. She also dated Benicio del Toro, Leonardo DiCaprio, and David Spade.
In 2006, she began a relationship with German professional tennis player Tommy Haas. Sara and Tommy married and had two daughters: Evelyn in 2010 and Josephine Lena in 2015. However, after 18 years together, the couple announced their separation in August 2024.
Erin Foster previously dated DJ, singer, and songwriter Samantha Judith Ronson. In 2018, she met Simon Tikhman at a gym. Tikhman is an investor and music executive, known as the founder of The Core Records. In 2023, he launched the music label The Core Records in partnership with Universal Music Group.
Erin married Simon Tikhman on December 31, 2019. Prior to the marriage, she converted to Reform Judaism. The couple welcomed their daughter, Noah Mimi Tikhman, in 2024.
Favorite Daughter: Commercializing LA Style
Erin and Sara Foster broke into the Los Angeles fashion world right in the middle of the COVID-19 pandemic, launching Favorite Daughter in December 2020. They initially rolled out a collection of elevated essentials: a cashmere cardigan-bodysuit, a cable-knit sweater, turtlenecks, blazers, and sweatpants. The sisters’ favorite item was a hoodie with a built-in mask. This product, “The Mask Hoodie,” became a massive bestseller, perfectly symbolizing the brand’s focus on comfort and relevance during the pandemic era.
Their younger sister, Jordan Foster, is also involved, contributing to the brand’s creative direction and styling of the collections.
To launch Favorite Daughter, the Foster sisters partnered with Centric Brands, a major licensing parent company for several fashion labels, including Hervé Léger, Joe’s Jeans, and Hudson Jeans.
The name “Favorite Daughter” itself is a nod to a company they started at age 13 but never pursued. In many interviews, the founders emphasize that their primary focus is not on quick success or profitability, but on customer satisfaction. They are committed to ensuring their clients feel comfortable and confident, which is why they prioritize quality and constantly address the needs of modern women. You can see the sisters promoting their line and discussing their business in this clip from Extra on YouTube.
Business Strategy and Marketing Success
The story of Favorite Daughter proves that authenticity and relevance can triumph over traditional qualifications. Erin and Sara Foster didn’t just launch another clothing line; they masterfully commercialized their own personal LA style, blending the high quality of premium materials with practical, everyday wardrobe pieces.
What’s the secret to their success? While no perfect formula exists, four key elements stand out:
- Leveraging Their Brand and Podcast: They used their recognizable public image and their podcast to directly connect with their audience and understand their specific fashion needs.
- Prioritizing Comfort: They focus on comfort over fleeting trends, ensuring that every woman who wears their clothes feels confident and at ease.
- Strategic Partnerships: By collaborating with industry professionals, the founders were able to successfully scale production without attempting to be the designers themselves.
- The Relatable Brand Name: The name and brand story create the feeling that every girl or woman is a “favorite daughter.” The Foster sisters often mention that family is an integral part of the brand that inspired the name. With five daughters, their dad (David Foster) would secretly tell one of them at a time that she was his favorite. Thus, the name was both ironic and perfectly apt when they launched the brand.
The Legacy and Future of Favorite Daughter
Favorite Daughter has successfully transformed the ephemeral “cool factor” of California style into a reliable and profitable business model. Their success is marked not only by surging sales but also by the Foster sisters’ own evolution. They didn’t stop at their clothing line; they began investing in other startups through a venture fund (including investments in and participation with companies like Bumble and Mirror). Erin and Sara Foster have proven that the best fashion doesn’t require sacrifice.
Instead, it reflects confidence. As a result, Favorite Daughter is firmly establishing itself as the go-to brand for perfect everyday chic.
Sources:
- https://www.hollywoodreporter.com/lifestyle/style/favorite-daughters-erin-and-sara-foster-prep-netflix-show-shiksa-with-steve-levitan-1235182489/
- https://shopfavoritedaughter.com/blogs/in-the-press/exclusive-erin-and-sara-foster-launch-clothing-brand-favorite-daughter?srsltid=AfmBOopIm2Y6IdvDXBYb44kEL7CZYQ_FwpCbXWdEHNXd1ARi-2BG8vVb
- https://www.forbes.com/sites/morganhines/2021/02/05/favorite-daughter-how-erin-and-sara-foster-broke-into-the-fashion-world-during-covid-19-with-new-brand/