Gillian Anderson, 48, looks incredible in low-cut black dress as she joins dapper co-star Jamie Dornan for The Fall series three photocall

By Kate Thomas for MailOnline

Published: 14:38 EST, 7 September 2016 | Updated: 19:57 EST, 7 September 2016

The Fall has gripped viewers and critics alike since it first premiered in 2013.

And Gillian Anderson and Jamie Dornan were back together at last, promoting the highly-anticipated third series of the crime drama on Wednesday.

The on-screen rivals joined forces for the event, with both stars looking impeccably stylish at the central London event.

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Third and final series: Gillian Anderson and Jamie Dornan were back together at last, promoting the highly-anticipated new series of The Fall in London on Wednesday

Third and final series: Gillian Anderson and Jamie Dornan were back together at last, promoting the highly-anticipated new series of The Fall in London on Wednesday

Gillian, 48, looked amazing in a simple black, pleated dress with a low neckline and a midi cut.

She kept her attire simple, rounding off the look with black strappy heels and a leather watch.

The X-Files favourite starred her blonde bob in loose curls and kept her make-up natural for the occasion.

Chic as ever: Gillian, 48, looked amazing in a simple black, pleated dress with a low neckline and a midi cut

Chic as ever: Gillian, 48, looked amazing in a simple black, pleated dress with a low neckline and a midi cut

Classic vibes: She kept her attire simple, rounding off the look with black strappy heels and a leather watch
Classic vibes: She kept her attire simple, rounding off the look with black strappy heels and a leather watch

Classic vibes: She kept her attire simple, rounding off the look with black strappy heels and a leather watch

Cunning killer: Gillian plays detective Stella Gibson, on a mission to catch serial killer Phil Spector (Dornan)

Cunning killer: Gillian plays detective Stella Gibson, on a mission to catch serial killer Phil Spector (Dornan)

Casual: Jamie was handsome as ever in a baby blue shirt and bright blazer, dressing down the look with dark trousers and lace-up shoes

Casual: Jamie was handsome as ever in a baby blue shirt and bright blazer, dressing down the look with dark trousers and lace-up shoes

Jamie, 34, was handsome as ever in a baby blue shirt and bright blazer, dressing down the look with dark trousers and lace-up shoes.

Gillian plays detective Stella Gibson, on a mission to catch serial killer Phil Spector (Dornan). 

The second series ended with a major cliff-hanger as Spector shot in the arms of Gibson.

Terrific trio: The pair posed alongside The Fall's writer and creator, Allan Cubitt 

Terrific trio: The pair posed alongside The Fall's writer and creator, Allan Cubitt 

Going out in style: The upcoming series, which will air this autumn, is expected to be the last

Going out in style: The upcoming series, which will air this autumn, is expected to be the last

Leading ladies: Aisling Franciosi, Valene Kane and Aisling Bea also attended the photocall 

Leading ladies: Aisling Franciosi, Valene Kane and Aisling Bea also attended the photocall 

Not long to wait: Valene (L) plays Rose Stagg, the ex-girlfriend of Spector, while Aisling (R) joins the cast for series three
Not long to wait: Valene (L) plays Rose Stagg, the ex-girlfriend of Spector, while Aisling (R) joins the cast for series three

Not long to wait: Valene (L) plays Rose Stagg, the ex-girlfriend of Spector, while Aisling Bea (R) joins the cast for series three

All smiles: Aisling Franciosi plays babysitter Katie Benedetto, who develops a crush on Jamie's character 

All smiles: Aisling Franciosi plays babysitter Katie Benedetto, who develops a crush on Jamie's character 

The last words uttered in the finale were Gillian shouting, 'We're losing him', as the troubled killer lies fighting for his life.

Teasing fans about the upcoming series, Jamie said his character is taken to an 'unexpected place' during an interview on The One Show.

He said: 'It goes in quite an unexpected place in series three, without giving too much away.'

The Northern Irish heartthrob also praised the show for 'changing his life', saying, 'I'm forever grateful'.

In conversation: The pair took part in a Q&A following the screening of the first episode of series three

In conversation: The pair took part in a Q&A following the screening of the first episode of series three

All smiles: Gillian beamed as she fielded some tricky questions during the press conference 

All smiles: Gillian beamed as she fielded some tricky questions during the press conference 

Animated: The Fifty Shades Of Grey star spoke passionately about the show 

Animated: The Fifty Shades Of Grey star spoke passionately about the show 

Why so serious: The mood was intense during the screening at the BFI Southbank

Why so serious: The mood was intense during the screening at the BFI Southbank

On the big screen: The duo discussed the first nail-biting episode of the series 

On the big screen: The duo discussed the first nail-biting episode of the series 

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