Anthony Flanagan (born 11 April 1972 as Tony Bonello) is an English actor most widely known for his portrayal of policeman Tony in Channel 4's comedy-drama series Shameless.

Flanagan was born in Stockport, Cheshire. At school he was called Anthony Bonello. After leaving Grange Comprehensive School, in Oldham, he worked as a joiner. At 16 he went to London, taking on occasional odd jobs and for a time slept on the streets. Flanagan has described this as "a very bad period". Flanagan decided to become an actor after seeing a friend of his sister perform at RADA.

Flanagan studied at Oldham College and Capitol Theatre in Manchester (now Manchester Metropolitan University) after a year of unemployment. Flanagan's first professional job was in a lead role at the RSC (Royal Shakespeare Company) in the 2001/02 season, playing Pat Harford in Peter Whelan's play A Russian in the Woods. (Flanagan would later reflect on the experience of appearing on stage naked.) This led to a collaboration with writer and theatre critic Richard Edmonds on a one-man show on the life of Baudelaire entitled King of a Rainy Country.

Notable work includes roles series in Shameless, Vincent, Cracker (where his roles as Kenny Archer in the 2006 TV film was almost universally praised despite mixed critical reaction to the comeback show itself), Life on Mars, Foyle's War, All About George, Casualty, Holby City, The Bill, Spooks, Spooks: Code 9, Doctor Who, Survivors and Red Riding. He played his first major lead role in the short serial Instinct, broadcast in February 2007 and was due to appear in the West End in Glengarry Glen Ross in October 2007 but withdrew due to 'personal reasons'.