Tyler and Cameron Winklevoss are rowing across the Atlantic—figuratively speaking, of course—to bring their Gemini cryptocurrency exchange to the United Kingdom.

The twin brothers and former Olympic rowers announced early this week they are opening an exchange in London, where UK residents can buy and sell bitcoins as well as ether. Gemini customers in Britain can buy ether with bitcoin or even sell ether for bitcoin.

The Winklevoss brothers, who were made famous by the Hollywood film “The Social Network,” became digital currency entrepreneurs in late 2015—after winning a $65 million settlement from Facebook—when they launched online marketplace Gemini in New York. Several months later, Gemini became the world’s first licensed ether exchange.

Tyler Winklevoss told The Telegraph: “We know there’s been a lot of demand for our services in the UK, we know there’s a strong desire, New York and London are financial capitals of the world and speak the same language.”