Harriet Cains is an English actress. In 2012, she made her acting debut with a one-episode role in Doctors. The following year, she played recurring character Harriet Gonzalez in the soap opera Hollyoaks Later. She also appeared in the short films called The Love Interest and Human Beings. From 2013 to 2014, she became known for her role as Jem Walker in the BBC Three’s In the Flesh. After this, she appeared as Louisa Blackwell in some episodes of the crime drama Safe House. Cains went on to make guest roles in such shows as Vera, No Offence, and Line of Duty. In 2018, she played Gail Davidson in Marcella. As of 2020, the actress stars as Philipa Featherington in the new series Bridgerton.