Meghan Markle’s earning her stripes in Montecito.

Ahead of her birthday, the Duchess of Sussex enjoyed a dinner date with husband Prince Harry at local eatery Tre Lune Wednesday night, with Markle choosing a black-and-white striped tube dress for the couple’s night out.

She wore Posse’s Theo Strapless Dress ($239), which recently also popped up on Arielle Charnas, in addition to several other influencers and models.

The Archewell founder styled hers with a wood-beaded Cult Gaia Nia Clutch ($428), minimalist Emme Parsons Cecilia Sandals ($415), looped gold Tabayer Oera Earrings ($3,900) and her signature messy bun.

Posse Theo Strapless Dress ($239)

Cult Gaia Nia Clutch ($428)

Emme Parsons Cecilia Leather Thong Sandals ($415)

Tabayer Oera 18K Fairmined Yellow Gold Earrings ($3,900)

Based in Sydney, Australia, Posse offers versatile, vintage-inspired dresses and separates that embody the “quiet luxury” trend at a more accessible price point.

Perhaps it’s no surprise, then, that the label got a big boost when “stealth wealth” style star Sofia Richie selected its white linen Emma Vest ($210) and matching Pencil Skirt ($249) for one of her pre-wedding events in April.

Lily Aldridge is also a brand fan, having posed on Instagram in the striped Charlie One-Piece ($95, originally $189) earlier this year.

But in keeping with its “less is more” design philosophy and commitment to delivering what it calls “conscious collections,” Posse produces each piece in limited quantities — meaning popular items often sell out fast.

So if you’re eyeing Markle’s strapless style, we’d suggest shopping swiftly.