Tamsin Lewis is a musician and historian, with a particular interest in the early modern period. She studied violin at the Florence Conservatoire before reading Classics and Italian at Oxford.

Tamsin directs the early music ensemble Passamezzo, and has written, arranged, directed and played music for theatre productions at venues including Shakespeare's Globe, the Rose Theatre and Hampton Court. She collaborates with university departments, and with theatre, costume, and dance historians and practitioners to reconstruct court masques and other 16th/17th Century entertainments.

Tamsin is an associate lecturer in Renaissance music and art at the Courtauld Institute and is a Fellow of the Royal Historical Society. She has written a number of books and articles on early modern music and society. Particular areas of expertise include popular music and song, broadside ballads, seasonal festivals, weddings, chocolate, coffee, and the plague.

Recent work in film and TV includes working as historical and musical consultant on Firebrand,
A Discovery of Witches, Becoming Elizabeth and Draw on Sweet Night, teaching Danny Dyer to sing in Danny Dyer's Right Royal Family, and talking with Lucy Worsley about 16th Century Christmas customs in A Merry Tudor Christmas.