Colin Firth appeared a shadow of his former self as he showed off a slimmed-down look at the 'Devil's Knot' film premiere at the Toronto International Film Festival.
His weight loss is all in the name of art though - he shed the pounds to play a prisoner of war in Second World War film 'The Railway Man'.
Reese Witherspoon and Colin Firth at TIFF
The film, scheduled to be released in Britain in January, sees Firth play Eric Lomax, a real-life railway enthusiast from Scotland, still struggling to cope with his previous brutal treatment when incarcerated in Burma. A young Lomax is played by Jeremy Irvine.
Eric's wife Patti Lomax is played in the film by Nicole Kidman.
Colin Firth in Toronto
Reese Witherspoon, Colin Firth(01 of22)
Reese Witherspoon, left, and Colin Firth, cast members in "Devil's Knot," pose together at the premiere of the film on day 4 of the 2013 Toronto International Film Festival in the Visa Screening Room at the Elgin Theatre on Sunday, Sept. 8, 2013 in Toronto. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Reese Witherspoon, Colin Firth(02 of22)
Reese Witherspoon, left, and Colin Firth, cast members in "Devil's Knot," pose together at the premiere of the film on day 4 of the 2013 Toronto International Film Festival in the Visa Screening Room at the Elgin Theatre on Sunday, Sept. 8, 2013 in Toronto. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Colin Firth(03 of22)
Colin Firth, a cast member in "Devil's Knot," poses at the premiere of the film on day 4 of the 2013 Toronto International Film Festival in the Visa Screening Room at the Elgin Theatre on Sunday, Sept. 8, 2013 in Toronto. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Colin Firth, Livia Giuggoli(04 of22)
Colin Firth, a cast member in "Devil's Knot," poses with his wife Livia Giuggioli at the premiere of the film on day 4 of the 2013 Toronto International Film Festival in the Visa Screening Room at the Elgin Theatre on Sunday, Sept. 8, 2013 in Toronto. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Colin Firth, Reese Witherspoon(05 of22)
Reese Witherspoon, left, and Colin Firth, cast members in "Devil's Knot," pose together at the premiere of the film on day 4 of the 2013 Toronto International Film Festival in the Visa Screening Room at the Elgin Theatre on Sunday, Sept. 8, 2013 in Toronto. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
"The Devil's Knot" Premiere - Arrivals - 2013 Toronto International Film Festival(06 of22)
TORONTO, ON - SEPTEMBER 08: Actor Colin Firth attends 'The Devil's Knot' premiere during the 2013 Toronto International Film Festival at The Elgin on September 8, 2013 in Toronto, Canada. (Photo by Jason Merritt/Getty Images) (credit:Getty Images)
"The Devil's Knot" Premiere - Arrivals 2013 Toronto International Film Festival(07 of22)
TORONTO, ON - SEPTEMBER 08: Actress Reese Witherspoon and actor Colin Firth attend 'The Devil's Knot' premiere during the 2013 Toronto International Film Festival at The Elgin on September 8, 2013 in Toronto, Canada. (Photo by Jason Merritt/Getty Images) (credit:Getty Images)
Colin Firth(08 of22)
Patti Lomax, second right, speaks during the press conference for "The Railway Man" at the 2013 Toronto International Film Festival in Toronto on Saturday, Sept. 7, 2013. From left, director Jonathan Teplitzky, actors Colin Firth, Jeremy Irvine and Tanroh Ishida, Lomax, and screenwriter Frank Cottrell Boyce. (AP Photo/The Canadian Press, Galit Rodan) (credit:AP)
Colin Firth(09 of22)
Actor Jeremy Irvine poses for a photo before the press conference for "The Railway Man" at the 2013 Toronto International Film Festival in Toronto on Saturday, Sept. 7, 2013.(AP Photo/The Canadian Press, Galit Rodan) (credit:AP)
Colin Firth(10 of22)
Actor Jeremy Irvine poses for a photo before the press conference for "The Railway Man" at the 2013 Toronto International Film Festival in Toronto on Saturday, Sept. 7, 2013. (AP Photo/The Canadian Press, Galit Rodan) (credit:AP)
Colin Firth(11 of22)
Actor Colin Firth answers a question during the press conference for "The Railway Man" at the 2013 Toronto International Film Festival in Toronto on Saturday, Sept. 7, 2013. (AP Photo/The Canadian Press, Galit Rodan) (credit:AP)
"Railway Man" Portraits - 2013 Toronto International Film Festival(12 of22)
TORONTO, ON - SEPTEMBER 07: Actor Colin Firth of 'Railway Man' poses at the Guess Portrait Studio during 2013 Toronto International Film Festival on September 7, 2013 in Toronto, Canada. (Photo by Larry Busacca/Getty Images) (credit:Getty Images)
"The Railway Man" Press Conference - 2013 Toronto International Film Festival(13 of22)
TORONTO, ON - SEPTEMBER 07: L-R) Actor Jeremy Irvine, director Jonathan Teplitzky, actor Tanroh Ishida, screenwriter Frank Cottrell Boyce, Patti Lomax and actor Colin Firth attend 'The Railway Man' Press Conference during the 2013 Toronto International Film Festival at TIFF Bell Lightbox on September 7, 2013 in Toronto, Canada. (Photo by Jason Merritt/Getty Images) (credit:Getty Images)
"The Railway Man" Press Conference - 2013 Toronto International Film Festival(14 of22)
TORONTO, ON - SEPTEMBER 07: Actor Colin Firth attends 'The Railway Man' Press Conference during the 2013 Toronto International Film Festival at TIFF Bell Lightbox on September 7, 2013 in Toronto, Canada. (Photo by Jason Merritt/Getty Images) (credit:Getty Images)
"The Railway Man" Press Conference - 2013 Toronto International Film Festival(15 of22)
TORONTO, ON - SEPTEMBER 07: Actor Colin Firth speaks onstage at 'The Railway Man' Press Conference during the 2013 Toronto International Film Festival at TIFF Bell Lightbox on September 7, 2013 in Toronto, Canada. (Photo by Matt Cowan/Getty Images) (credit:Getty Images)
"The Railway Man" Press Conference - 2013 Toronto International Film Festival(16 of22)
TORONTO, ON - SEPTEMBER 07: Actor Colin Firth speaks onstage at 'The Railway Man' Press Conference during the 2013 Toronto International Film Festival at TIFF Bell Lightbox on September 7, 2013 in Toronto, Canada. (Photo by Matt Cowan/Getty Images) (credit:Getty Images)
"The Railway Man" Press Conference - 2013 Toronto International Film Festival(17 of22)
TORONTO, ON - SEPTEMBER 07: Actor Colin Firth attends 'The Railway Man' Press Conference during the 2013 Toronto International Film Festival at TIFF Bell Lightbox on September 7, 2013 in Toronto, Canada. (Photo by Jason Merritt/Getty Images) (credit:Getty Images)
"The Railway Man" Premiere - Arrivals - 2013 Toronto International Film Festival(18 of22)
TORONTO, ON - SEPTEMBER 06: Actor Colin Firth arrives at 'The Railway Man' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 6, 2013 in Toronto, Canada. (Photo by Alberto E. Rodriguez/Getty Images) (credit:Getty Images)
"The Railway Man" Premiere - Arrivals - 2013 Toronto International Film Festival(19 of22)
TORONTO, ON - SEPTEMBER 06: Actors Nicole Kidman (L) and Colin Firth speak at 'The Railway Man' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 6, 2013 in Toronto, Canada. (Photo by Alberto E. Rodriguez/Getty Images) (credit:Getty Images)
"The Railway Man" Premiere - Arrivals - 2013 Toronto International Film Festival(20 of22)
TORONTO, ON - SEPTEMBER 06: Actor Colin Firth arrives at 'The Railway Man' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 6, 2013 in Toronto, Canada. (Photo by Alberto E. Rodriguez/Getty Images) (credit:Getty Images)
"The Railway Man" Premiere - Arrivals - 2013 Toronto International Film Festival(21 of22)
TORONTO, ON - SEPTEMBER 06: Actor Colin Firth arrives at 'The Railway Man' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 6, 2013 in Toronto, Canada. (Photo by Alberto E. Rodriguez/Getty Images) (credit:Getty Images)
"The Railway Man" Premiere - Arrivals - 2013 Toronto International Film Festival(22 of22)
TORONTO, ON - SEPTEMBER 06: Actor Colin Firth attends the 'The Railway Man' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 6, 2013 in Toronto, Canada. (Photo by Alberto E. Rodriguez/Getty Images) (credit:Getty Images)