Sienna Miller names baby daughter 'Marlowe'

Tom Sturridge and Sienna Miller in Portofino, Italy. May 2012. © Splash News Online

The sister of super-private Sienna Miller has revealed her niece's name on Twitter. Savannah Miller tweeted, "Marlowe I love you." Sienna, 30, and rumoured fiancé Tom Sturridge, 26, became parents last weekend. The actress gave birth to their baby girl in London.

Marlowe is an old English name meaning 'driftwood'.