Patrick Baladi plays as Stephen Holmes in Line of Duty.
Patrick Baladi is the top #1 member of the cast and appears in 24 episodes.

From Wikipedia, the free encyclopedia Lee Ingleby (born 28 January 1976) is a British film, television, and stage actor. He is perhaps best known for his roles as Detective Sergeant John Bacchus in the BBC Drama George Gently and as Stan Shunpike in Harry Potter and the Prisoner of Azkaban, but he has made numerous appearances in British television drama and comedy in recent years. These include a lead role as Sean O'Neill in Jimmy McGovern's The Street, and a recurring role in the second series of Early Doors as Mel's boyfriend, Dean. In addition, he played a significant part in the final episode of series one of Life on Mars, playing Sam Tyler's father Vic, and made an appearance in Spaced in 2001 (which was, along with Harry Potter, a rare occasion upon which he did not use his natural Northern accent, instead playing a Cockney). Description above from the Wikipedia article Lee Ingleby, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Lee Ingleby plays as Paul Hughes in Line of Duty.
Lee Ingleby is the top #2 member of the cast and appears in 18 episodes.

Daniel Mays was born on March 31, 1978 in Epping, Essex, England as Daniel Alan Mays. He is an actor, known for The Adventures of Tintin: The Secret of the Unicorn (2011), The Bank Job (2008) and Atonement (2007). He has performed five plays at the Royal Court Theatre in London including two in the theatre's 50th Anniversary year in parts that were specifically written for him. He won the Best Actor prize at the Palmare Television Festival 2003 for his performance in the hard hitting improvised BBC film Rehab. He has made two films with the acclaimed British director Mike Leigh. All or Nothing (2002) and the 1950s abortion drama, Vera Drake (2004), which received 3 Academy Award Nominations, the Golden Lion Award for Best Film, 3 Bafta Awards and 6 British Independent Film Awards including Best British Independent Film. Son of Toni Mays.

Daniel Mays plays as DI John Major in Line of Duty.
Daniel Mays is the top #3 member of the cast and appears in 18 episodes.

Stephen Graham (born August 3, 1973) is a British film and television actor, best known for playing Andrew 'Combo' Gascoigne in This Is England and Scrum in the Pirates of the Caribbean feature films.

Stephen Graham plays as DI Roy Carver in Line of Duty.
Stephen Graham is the top #4 member of the cast and appears in 18 episodes.

Arsher Ali was born on April 9, 1984 in Nottingham, England. He is an actor, known for The Ritual (2017), Line of Duty (2012) and Complicit (2013). He has been married to Roxy Shahidi since 2010.

Arsher Ali plays as Samir Qureshi in Line of Duty.
Arsher Ali is the top #5 member of the cast and appears in 18 episodes.

Vicky McClure is an English actress best known for her work in the films of director Shane Meadows

Vicky McClure plays as Mrs. Jones in Line of Duty.
Vicky McClure is the top #6 member of the cast and appears in 16 episodes.

Polly Walker (born 19 May 1966) is an English actress. Description above from the Wikipedia article Polly Walker, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Polly Walker plays as Gill Biggeloe in Line of Duty.
Polly Walker is the top #7 member of the cast and appears in 12 episodes.

From Wikipedia, the free encyclopedia. Adrian Dunbar (born 1 August 1958) is an actor from Northern Ireland, best known for his television and theatre work. Dunbar co-wrote and starred in the 1991 film, Hear My Song, nominated for Best Original Screenplay at the BAFTA awards. Description above from the Wikipedia article Adrian Dunbar, licensed under CC-BY-SA, full list of contributors on Wikipedia.​

Adrian Dunbar plays as Jim Hogan in Line of Duty.
Adrian Dunbar is the top #8 member of the cast and appears in 12 episodes.

Maya Sondhi plays as PC Maneet Bindra in Line of Duty.
Maya Sondhi is the top #9 member of the cast and appears in 12 episodes.

Melanie Thandiwe Newton OBE (/tænˈdiːweɪ/ tan-DEE-way; born 6 November 1972) is an English actress. Newton has received various awards, including a Primetime Emmy Award and a British Academy Film Award, in addition to nominations for two Golden Globe Awards. She was appointed Officer of the Order of the British Empire (OBE) in the 2019 New Year Honours for services to film and to charity. Newton is known for starring roles such as the title character in Beloved (1998), Nyah Nordoff-Hall in Mission: Impossible 2 (2000), Tiffany in Shade (2003), Dame Vaako in The Chronicles of Riddick (2004), Christine in Crash (2004), for which she received a BAFTA Award for Best Actress in a Supporting Role, Linda in The Pursuit of Happyness (2006), Libby in Run Fatboy Run (2007), Stella in RockNRolla (2008), Condoleezza Rice in W. (2008), Laura Wilson in 2012 (2009), Tangie Adrose in For Colored Girls (2010), and Val in Solo: A Star Wars Story (2018). Since 2016, Newton has played the sentient android, the madam Maeve Millay, in the HBO science fiction-western series Westworld, for which she received a Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series and two Critics Choice Awards, as well as nominations for a Golden Globe Award, Saturn Award, and Screen Actors Guild Award. In 2017, she portrayed DCI Roz Huntley in the BBC drama series Line of Duty, which earned her a nomination for the British Academy Television Award for Best Actress. In April 2021, Newton, having been widely known as Thandie Newton for 30 years because of a misspelling of her first name in the credits of her first film, announced she was finally correcting this and would henceforth be known and credited as Thandiwe Newton, her real name, beginning with Reminiscence (2021).

Thandiwe Newton plays as Mona the Hormone Monstress (voice) in Line of Duty.
Thandiwe Newton is the top #10 member of the cast and appears in 10 episodes.