Catherine Malloy Hollern CBE (born 12 April 1955) is a British Labour Party politician who served as Member of Parliament (MP) for Blackburn from 2015 to 2024.

Hollern was re-elected to represent Wensley Fold following boundary changes in 1997,[4] and in 2004 she succeeded Bill Taylor to become Council Leader.

[6] In March 2014, Hollern was selected, using an all-women shortlist, to succeed former cabinet minister Jack Straw as the Labour candidate for Blackburn.

[15] Following Keir Starmer's election as Labour leader, Hollern served as Shadow Minister for Communities and Local Government from 2020.

She resigned on 12 May 2021 after being accused of trying to "isolate a parliamentary worker who had made allegations of sexual harassment" against former Labour MP Mike Hill.