One of the talking points around huge comic book movies and Oscar-baiting dramas is often around how much weight an actor has gained or lost to bring their character to life.
Many stars see it as a dedication to their craft, that they feel like they have to physically look a certain way to embody a character or a person to the best of their ability.
However, it can be extremely difficult to achieve specific weight gain and loss at either end of the spectrum, and a number of stars like Hugh Jackman, Cillian Murphy, and Paul Rudd have opened up about what it's like putting the work in for the big screen.