Marcus became an actor in 1984 after three years of training at Arts Educational Schools in London; he spent the first six months of his career touring throughout London's parks and schools in Robin Hood & The Tree Trick, which was quickly followed by his first film role as Moose in the cult film My Beautiful Laundrette.
After a few years working in theatre, commercials and supporting roles on television, Marcus joined the cast of fledgling comedy Birds of a Feather as Dave, the lover of Sharon (Pauline Quirke).
A year of acting in commercials introduced Marcus to director Peter Chelsom. Chelsom cast him right away as Gordon in Hear My Song, opposite Ned Beatty. This was followed by roles on British television, in programmes such as The Hot Dog Wars, Dangerfield, Class Act, Kavanagh QC and Our Friends in the North. Meanwhile, Marcus's movie career was also progressing, with roles opposite Timothy Dalton in The Beautician and the Beast, Robert Englund in The Killer Tongue and Richard Harris in Savage Hearts.
In 1996 Marcus's agent arranged a meeting for a small low-budget movie with a then-unknown director named Guy Ritchie; Ritchie offered Marcus the role of Nick the Greek in Lock, Stock and Two Smoking Barrels alongside Nick Moran, Vinnie Jones, Jason Statham and Matthew Vaughn. Three years later, the film was released and garnered a high level of success.
Lock, Stock and Two Smoking Barrels led to further movie roles. Marcus completed a small role in Alan Parker's Angela's Ashes; he played Bouchon in Quills, alongside Kate Winslet, Michael Caine, Joaquin Phoenix and Geoffrey Rush; for Richard Eyre, he played Iris opposite Judi Dench and acted in Complete Female Stage Beauty with Claire Danes; and he also attained the role of Ted Ray in The Greatest Game Ever Played, directed by Bill Paxton.
Alongside a very successful movie career, Marcus also starred in several American, Canadian and UK television series: Starhunter 2300, in which he played Rudolpho De Luna; he played the co-lead in the BBC series Cavegirl; he played Banjo and Broadman in the adaptations of Terry Pratchett’s Hogfather and The Colour of Magic, respectively; he starred in the two 20th anniversary episodes of “Casualty”; and Marcus also appeared in regular roles in Kingdom (with Stephen Fry) and Larkrise to Candleford. Marcus has also completed two films with the Wachowski Brothers: Speed Racer and Ninja Assassin.
In 2012 Marcus appeared in five feature films: It’s A Lot, Two Days in the Smoke, Gridiron UK, AB Negative and Fast & Furious 6. In April 2012, he completed filming for independent British gangster thriller Two Days in the Smoke, in which he plays the hitman Ben, alongside Snatch actor Alan Ford and Matt Di Angelo from BBC Hustle.
In July 2012, Marcus launched a new Gangster London walking tour in association with Brit Movie Tours, in which he explores the dark history of London's East End. He also starred in Perry Bhandal's Interview with a Hitman (2012) as Traffikant, a Romanian Crime Boss, alongside Luke Goss.
In May 2013, Marcus played the roles of Varney, Homeless man, Letting Agent & First Guard in a BBC radio adaptation of Neil Gaiman’s Neverwhere, adapted by Dirk Maggs.
Marcus is married to Sarah and owns two small dogs, Fry and Ronnie. He has two main hobbies: golf and American Football, the latter of which he used to play and coach.
Marcus played American football in the UK for the BAFL One team Sussex Thunder and retired at the end of the 2007 season. He was interviewed for Sky Sports' Sunday NFL coverage after the Thunder's 2007 fixture at the Ipswich Cardinals. The interview, which was broadcast on 21 October 2007, discussed his acting career, as well as American Football. Marcus has been an offensive line coach at the London Olympians and at Valley Trojans.The Coroner episode 2.3 "Those in Peril" as Gobby Mitchell
IT’S A LOT as Mr. Hatherly
Fast & Furious 6 as Davies
AB Negative as Mr. Fines
Gridiron UK as Eddie
Interview with a Hitman as Traffikant
Speed Racer as Security Goon
Female Stage Beauty as Cockerill
The Baby Juice Express as Lenny Von Something
Don't Look Back (writer/Actor) as Uncle max
Iris as Taxi Driver
Londinium or Fourplay as Davy
Redemption Road (Actor/Writer) as Joe
Sorted as Rob
Angela's Ashes as English Agent
The Beautician and the Beast as Ivan
Killer Tongue as Ralph
Savage Hearts as Hector
Hear My Song as Gordon
Arrivederci Millwall as Mal
My Beautiful Laundrette as Moose
Cavegirl as Dad
Lock, Stock and Two Smoking Barrels as Nick the Greek
Terry Pratchett's Hogfather as Banjo Cropper
The Greatest Game Ever Played as Ted Ray
Kinky Boots as Big Mike
Starhunter as Rudolpho DeLuna
Terry Pratchett's The Colour of Magic as Broadman
Ninja Assassin as Kingpin
Hear My Song as Gordon
Quills as Bouchon
Adam's Family Tree as Bulgar the Bulgarian
Stay Lucky as Neil
Between the Lines as Mortuary Assistant
Red Dwarf as Bear Strangler McGee
The Thin Blue Line as Terry
Two Days in the Smoke as Ben
Holby City as Jarvis Wells
Class Act as Geoff
The Comic Strip "Five Go To Rehab" as Dirty Douglas
Frank Stubbs Promotes as Journalist
Rumble (series) as Melvin
The Bill (series) as Cliff Taylor/Tony Bladwell/Ade Lester/Wayne Smith/Purkis
Midsomer Murders as Silas Trout
Little Dorrit as Jonson
Sunshine as Big Alan
Screen One "Doggin' Around" as Newman
Kingdom (series) as Hill
Brush Strokes as 2nd Pub Customer
Doctor Who as Jailer (in "The Shakespeare Code")
The Glam Metal Detectives (series) as Man with Machine Gun/Bailiff/Yacko the Yeti/Jim Dumper
Casualty as Tommy Indler
KYTV as Large Man
Kavanagh QC as Baxter
Roger Roger as Detective Sergeant Calderwood
Boon as Curly Robinson
Without a Trace as Roger
Dangerfield as Jay Butterfield
Paul Merton in Galton and Simpson's.... as Thug
Lark Rise to Candleford (series) as Matthew Welby
99-1 as McCarthy's Man/Pursuer
Coogan's Run as Gerald the Sumo Magician
The Black Velvet Band as Nudge
The Detectives as Fat Reg
Our Friends in the North as Cyril Hellier
Birds of a Feather (2 series) as Dave
Van der Valk as Burly Man
Faith No More - I Started A Joke (Music Video)