English actress best known for her role as Ames in the television series Human Target from 2010 until 2011. She began starring as Mary Sibley on the WGN series Salem in 2014 and in New Amsterdam as of 2018. She has also appeared in films such as The Rapture and Black Swan.
She trained as a dancer at the Stella Mann College of Performing Arts in Bedford.
She was cast in the miniseries Dancing on the Edge online via Skype.
She was raised with her family in Bournemouth, Dorset, England. Montgomery and her husband Joe Fox have a daughter named Sunday Juno who was born in 2019.
She co-starred with Paul Rudd in the 2011 film Our Idiot Brother.