The "True Detective" star put his fit physique on display on the streets of West Hollywood on Wednesday, as he walked around sans shirt following an intense yoga class.
Sporting a goatee, freshly-cut locks and track pants, Colin's appearance was a far cry from his current role as the paunch-packing Ray Velcoro on the HBO crime series.
The actor had to gain over 40 pounds for his work on both "True Detective" and upcoming film "The Lobster" -- something he wasn't too excited about.
"People think it must be fun to eat what you want - and it is, for the first day," he explained to Glamour. "Day two, when you're already on your second cheeseburger and fries with a chocolate shake by 11am, not so much."
"I do prefer to feel a little less slovenly," he added. "I usually work out a bit more - I do yoga and go hiking. But my grooming 'routine' mainly involves a tube of toothpaste and most days it stops there. I'm very low maintenance."
Clearly, Farrell got right back into his workout regimen -- and has the stomach to show for it!