‘The Boys’ Star Laz Alonso Thought Amazon Digitally Made Him Bigger in Season 3 Promo Posters Before His Stunning 40-Pound Turnaround

Most actors dread seeing themselves in promotional materials. For Laz Alonso, the experience became a genuine turning point. The actor best known for playing Marvin T. Milk, aka Mother’s Milk, in Amazon Prime Video’s ‘The Boys,’ has opened up about the jarring moment he spotted the Season 3 promo posters and barely recognised himself, going so far as to question whether the studio had digitally altered his appearance.

Alonso told Men’s Health that seeing his face on the Season 3 promotional artwork stopped him cold. His first instinct was that something had been done to the image, so he went directly to Amazon to ask whether they had added weight to him in post. They had not. The culprit was far more grounded, and far more relatable.

Filming Season 3 during and after the COVID pandemic, Alonso had leaned hard into food delivery apps and the best pizzas and burgers Toronto had to offer, sending his weight climbing to around 250 pounds on his six-foot frame. He described that figure as a lot of weight and acknowledged it simply was not healthy. The bulk had crept up on him so gradually that the promotional posters were the first time the full picture snapped into focus.

Before Season 4, Alonso decided he wanted to do something genuinely different, and a conversation with showrunner Erik Kripke gave him the narrative justification he needed. Kripke told him Mother’s Milk would be going through a significant transition that season, returning to a more disciplined, military way of operating. Alonso went into an extreme calorie reduction and even shaved, reasoning that his character now reported directly to the White House and needed to carry himself accordingly.

By the time Season 4 arrived, Alonso had shed around 40 pounds, and the difference was impossible to miss on screen. When fans first glimpsed the leaner version of Mother’s Milk, reactions ranged widely, with some commenters joking he must have been recast and others simply marveling at how much size he had dropped. A handful went further, drawing comparisons to the late Chadwick Boseman and expressing genuine concern about the actor’s health, though Alonso was quick to reassure everyone that the transformation was entirely intentional and rooted in personal wellbeing.

To guide the process, Alonso underwent a DNA test through fitness company BioSynergy, which helped him identify exactly which nutrients his body needed and which foods were placing unnecessary strain on his system. His revised diet leaned on whole foods, reduced lactose, and homemade cashew and coconut milk as alternatives, while his workout routine shifted from pure bulk-building toward a more balanced, functional approach.

What makes the story land is how neatly Alonso’s real-life wake-up call mirrored his character’s arc. Mother’s Milk becoming leaner, sharper, and more disciplined in Season 4 was not just good storytelling, it was the actor putting his own journey directly into the performance. As ‘The Boys’ continues into its fifth season, the transformation has only deepened, with Alonso’s noticeably different physique once again generating conversation among fans tracking the show’s ensemble.

It is a rare thing when a promotional poster becomes the catalyst for a genuine lifestyle overhaul, and rarer still when that overhaul feeds back so cleanly into the character being portrayed. Does seeing Alonso’s physical evolution across the seasons change how you read Mother’s Milk as a character, or does it feel like a distraction from the story?