Claire Holt launches Saint Sirène with three polished white T-shirt fits

Claire Holt is making the white T-shirt feel like a celebrity launch with a practical purpose. Saint Sirène debuted April 9 with three polished fits, each priced at $78, and the pitch is simple enough to make sense as a gift: stop guessing which tee will work and choose the one that matches her style.

The line was co-founded by Holt and Madeline Simmer after about a year of development, and it grew out of Holt’s own frustration with tees that stretched out or lost their shape. She polled friends and Instagram followers before deciding there was no single answer to the perfect white tee, which is exactly why the brand does not force one silhouette on every buyer. In a crowded premium-basics market, that specificity matters. A $78 T-shirt has to justify itself with fit, fabric behavior and repeat wear, not just a famous name.

The Best Friend is the safest gift for the minimalist or the woman who lives in tailored basics. Saint Sirène describes it as a dependable closet staple, and that makes it the most universally giftable of the three because it reads classic rather than trendy. The Boyfriend is the easy pick for the friend who likes a little room, relaxed proportions and clothes she can dress up or down without thinking too hard. The Girlfriend is the one for the woman who leans slightly more fashion-forward, especially if she likes high-waist or low-rise styling, since the cropped shape is designed to hit at the hip with a softer swing.

That fit-by-personality approach is the smartest part of the launch. It turns a basic into a decision tree: The Best Friend for the basics devotee, The Boyfriend for the comfort-first dresser, The Girlfriend for the trend-follower who still wants a white tee to feel polished. Saint Sirène also says color, wearability, stain-resistance, coverage and accessibility were priorities, which helps explain why this is meant to be a daily uniform, not a novelty top.

Holt’s shift from Hollywood to founder is part of the story, too. Best known for H2O: Just Add Water, The Vampire Diaries and The Originals, she discussed the brand on a Forbes Talks episode released April 14, saying a social post drew more than 40,000 comments and helped turn her audience into a business community of 13 million followers. Saint Sirène is also bootstrapped without outside capital, which gives the launch a more independent feel than many celebrity labels. The brand’s site adds free standard shipping on orders over $150 and a limited-edition headscarf with all orders, details that make the opening drop feel considered rather than inflated.