'My jeans were loose!' Diane Kruger reveals she got so depressed while filming In The Fade she lost seven pounds and started smoking again

Diane Kruger said she was so thoroughly immersed in the grief of her In the Fade character - she lost sleep, seven pounds, and started smoking again.

'My jeans were loose!' the German 41-year-old (who smoked in the nineties when she was an Elite Model) confessed at SAG-AFTRA Foundation Conversations on Monday.

'I felt like I was drowning the whole time. I felt like I was drowning in grief, drowning in the gray weather, and drowning in the story. I picked up smoking. I couldn't sleep...It changed my life forever.'

Scroll down for video  

Pictured Tuesday: Diane Kruger said she was so thoroughly immersed in the grief of her In the Fade character - she lost sleep, seven pounds, and started smoking again

Pictured Tuesday: Diane Kruger said she was so thoroughly immersed in the grief of her In the Fade character - she lost sleep, seven pounds, and started smoking again

The SAG Award winner prepared to play Katja Sekerci - a woman whose Kurdish husband and five-year-old son are killed in a neo-Nazis terrorist attack - by attending self-help groups in New York and Germany.

'Quickly, I realized the best way to research was to listen,' explained Kruger (born Heidkrüger), whose stepfather passed away during production.

'I breathed this movie. I breathed the victims' suffering. I tried to be as truthful as I could.'

The German 41-year-old confessed at SAG-AFTRA Foundation Conversations on Monday: 'My jeans were loose! I felt like I was drowning the whole time. I felt like I was drowning in grief, drowning in the gray weather, and drowning in the story. I picked up smoking'

The German 41-year-old confessed at SAG-AFTRA Foundation Conversations on Monday: 'My jeans were loose! I felt like I was drowning the whole time. I felt like I was drowning in grief, drowning in the gray weather, and drowning in the story. I picked up smoking'

Fashionable habit? The SAG Award winner - who befriended Karl Lagerfeld when she was 16 - used to smoke back in the nineties when she was an Elite Model living in Paris

Fashionable habit? The SAG Award winner - who befriended Karl Lagerfeld when she was 16 - used to smoke back in the nineties when she was an Elite Model living in Paris

'The best way to research was to listen': She prepared to play Katja Sekerci - a woman whose Kurdish husband and five-year-old son are killed in a neo-Nazis terrorist attack - by attending self-help groups

'The best way to research was to listen': She prepared to play Katja Sekerci - a woman whose Kurdish husband and five-year-old son are killed in a neo-Nazis terrorist attack - by attending self-help groups

For the Los Angeles screening, Diane donned a black double-breasted blazer over a white top, cropped blue jeans, and silver booties selected by stylist Micaela Erlanger.

Back on May 28, the natural blonde won the Cannes best actress trophy for her hard work, and Fatih Akin's Hamburg-set thriller scored a Critics' Choice Awards nod for best foreign language film on Wednesday.

And Diane wasn't alone as she also congratulated her boyfriend Norman Reedus on his best unstructured reality series nomination for AMC's motorcycle show, Ride with Norman Reedus.

Kruger, whose stepfather passed away during production, said: 'I breathed this movie. I breathed the victims' suffering. I tried to be as truthful as I could'
Kruger, whose stepfather passed away during production, said: 'I breathed this movie. I breathed the victims' suffering. I tried to be as truthful as I could'

Kruger, whose stepfather passed away during production, said: 'I breathed this movie. I breathed the victims' suffering. I tried to be as truthful as I could'

Casual: For the Los Angeles screening, Diane donned a black double-breasted blazer over a white top, cropped blue jeans, and silver booties selected by stylist Micaela Erlanger

Casual: For the Los Angeles screening, Diane donned a black double-breasted blazer over a white top, cropped blue jeans, and silver booties selected by stylist Micaela Erlanger

'Whaaa!' Back on May 28, the natural blonde won the Cannes best actress trophy for her hard work

'Whaaa!' Back on May 28, the natural blonde won the Cannes best actress trophy for her hard work

Hitting US theaters December 27! And Fatih Akin's Hamburg-set thriller scored a Critics' Choice Awards nod for best foreign language film on Wednesday

Hitting US theaters December 27! And Fatih Akin's Hamburg-set thriller scored a Critics' Choice Awards nod for best foreign language film on Wednesday

Kruger - who boasts 819K social media followers - gushed on Instagram: 'You deserve it all!'

Perhaps the Tout nous sépare stunner and the 48-year-old Walking Dead hunk will finally make their official red carpet debut at the Santa Monica ceremony, which airs January 11 on The CW.

The Kellyanne Conway Story funnywoman fell for the Florida-born father-of-one on the set of Sky in December, but they only went public with in March.

'You deserve it all!' And Diane wasn't alone as she also congratulated her boyfriend Norman Reedus on his best unstructured reality series nomination for AMC's motorcycle show, Ride with Norman Reedus

'You deserve it all!' And Diane wasn't alone as she also congratulated her boyfriend Norman Reedus on his best unstructured reality series nomination for AMC's motorcycle show, Ride with Norman Reedus

Pictured September 10: Perhaps the 48-year-old Walking Dead hunk and Kruger will finally make their red carpet debut at the LA ceremony, which airs January 11 on The CW

Pictured September 10: Perhaps the 48-year-old Walking Dead hunk and Kruger will finally make their red carpet debut at the LA ceremony, which airs January 11 on The CW

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

We are no longer accepting comments on this article.