New photos of Inn Sarin Ronnakiat are putting the actor's increasingly muscular physique back in the spotlight, months after a shirtless mirror selfie first had fans noticing just how much his build had changed.
In photos shared on Instagram on August 20, Inn poses in a fitted white knit shirt that makes his broader shoulders and noticeably larger arms hard to miss. Another image from the same post shows the actor alongside a friend, with his more muscular upper body again standing out beneath a fitted T-shirt.
The look is not entirely new.
On June 8, Inn shared a shirtless mirror selfie showing considerably more muscle across his chest, shoulders, arms and abdomen than in older photos. That image quickly became a reference point for fans tracking his physical transformation.
More recently, fans have begun placing the June photo beside a similar shirtless mirror selfie from 2024, highlighting just how much his physique has changed over roughly two years.
One comparison circulating on X labeled the images “2024 vs. 2026,” joking that the poster had previously thought Inn's 2024 physique was already his peak before seeing his significantly bulkier appearance this year. When captured, the post had surpassed 272,000 views and 7,400 likes.
The comparison also spans one of the most eventful stretches of Inn's BL career.
In 2024, Inn starred opposite Great Sapol Assawamunkong in GMMTV's _Wandee Goodday_, playing Dr. Wandee opposite Great's boxer Yoryak. The series established the actors as the official pairing popularly known as GreatInn.
They reunited in 2025 for the period BL _Memoir of Rati_, their second series together.
That professional pairing officially came to an end later that year. On September 19, 2025, GMMTV announced that Great and Inn had concluded their work as a pair, describing the decision as one reached with mutual understanding and respect as they pursued their respective career paths.
The announcement ended GreatInn as an official working partnership, but not their personal friendship. The two continued appearing together socially afterward, including with their Memoir of Rati co-stars.
Great has since moved into a new BL pairing and project, while Inn's public presence has continued to span acting, fashion and his growing portfolio of businesses.
And across that same period, his physical appearance has changed noticeably.
The progression is particularly clear when the photos are viewed chronologically: a leaner build in 2024, the much bulkier shirtless photo posted on June 8, and now the August images showing that added size continuing into the second half of 2026.
Inn has not publicly linked the change to a specific role or disclosed a detailed training program, so there is no basis to attribute the transformation to any particular project.
What is clear is that fans have noticed — and the latest photos are giving them another reason to talk.