Sian Brooke: Sian Brooke. Actress: Sherlock. Sian Brooke is a British actress, known for portraying Laura in All About George, Lori in Cape Wrath, and Eurus Holmes in Sherlock. Sian Elizabeth Phillips was born in Lichfield, Staffordshire, England and is the youngest of three siblings. She took on a stage name to avoid confusion with fellow actress Siân Phillips, choosing Brooke after an English Civil War general who served at Lichfield. She...