Actor Richard Gadd gained approximately 100 pounds to transform his appearance for the HBO/BBC series "Half Man" [1].

The physical change marks a significant departure from Gadd's previous role as Donny Dunn. This shift highlights the actor's commitment to method-based physical preparation to embody the character of Ruben [1].

Gadd, 36 [1], achieved the weight gain over the course of about one year [2]. This period occurred between the filming of "Baby Reindeer" in 2022 and the production of "Half Man" between 2023 and 2024 [2].

Speaking in New York City, the actor described the necessity of the change for the role. "I needed to change everything," Gadd said [3].

The transformation required a total overhaul of his physical presence to ensure the character of Ruben felt authentic. While some reports describe the gain as nearly 100 pounds, others state it was exactly 100 pounds [1, 2].

This process follows Gadd's success as the creator and star of "Baby Reindeer," where his physical portrayal differed sharply from the requirements of his latest project. The transition from the lean profile of Donny Dunn to the bulk of Ruben was a central element of the production's casting and development strategy [1].

“"I needed to change everything."”

Gadd's extreme physical transformation underscores a trend in prestige television where lead actors undergo significant bodily changes to establish character authenticity. By shifting his weight by 100 pounds in a single year, Gadd is leveraging physical metamorphosis to distance his new performance from the public's perception of him in "Baby Reindeer."