Welsh actress best known for her role in the award-winning television comedy Gavin & Stacey.
She studied at the Royal Academy of Dramatic Art, graduating in 1998.
She appeared in the 2003 film Love Actually and the 2001 film From Hell.
She got married to James Thornton in 2003. The couple welcomed their first daughter, Eva, in February 2013. In late 2021, she welcomed a daughter named Boe Willow Russell.
She acted in the 2005 TV movie Gideon's Daughter alongside British actress Emily Blunt .