David Harbour reveals his body transformation Journey for Stranger Things.

Harbour will be going live on Friday with his trainer to answer fans' questions and share some advice.

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[{"selector":"#anim-bb5a23f6-84bb-4e25-83e8-2d536cb059fd","keyframes":{"opacity":[0,1]},"delay":100,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-23553180-7510-49c7-9537-7266a02dcb80","keyframes":{"transform":["translate3d(0px, 171.76352%, 0)","translate3d(0px, 0px, 0)"]},"delay":100,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] On Thursday 47-year-old actor David Harbour opens up on his Instagram about what went into his character Hopper's slimmed-down look. Learn More Arrow

The fourth season included a scene between Hopper and Joyce where he was shirtless. Hopper is not only dramatically underweight but he's covered in scars.

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David had previously said he lost around 80 pounds for the Netflix series. In the caption of an Instagram post of Thursday afternoon he said:

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“My trainer David Higginslondon worked with me for 8 months to make the transformation, and then another year to keep it through the pandemic.”

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“All told it was a difficult and exciting ride, changing diet and exercise plans. We are gonna do an Instagram live tomorrow Friday at 4 pm UK time, which is 11 am eastern I believe.”

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[{"selector":"#anim-21fcda37-f6b8-4787-930d-0593a20c4dd2","keyframes":{"opacity":[0,1]},"delay":100,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3b36b5b4-e717-407c-8ebd-7678fb452751","keyframes":{"transform":["translate3d(-110.88825%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":100,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Learn More David Harbour says after losing 75 pounds for 'Stranger Things' he's now 'struggling' to get back to a good weight and gaining some back for another movie. Arrow

Said “I am struggling to fight back down towards a good weight for wherever hopper ends up in season 5. All this up and down is not good for the body, and I’ll have to give it up soon.

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In an interview with British GQ earlier this month, Harbour he lost weight by doing intermittent fasting and Pilates. "I don't think I'll ever do that again," he told the outlet.

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