Rob McElhenney has undergone serious body transformation over the years. The actor went through a series of physical changes while shooting It's Always Sunny In Philadelphia. 

Rob has been vocal about his body transformation and believes anyone can achieve it with a little commitment. Further, the 45-year-old called the paycheck the biggest motivation behind his dedication to the job.

Rob Weight Gain In It's Always Sunny Season 7

McElhenney underwent a massive weight gain for the seventh season of It's Always Sunny in Philadelphia.

Between the sixth and seventh seasons of the series, Rob gained 60 pounds in a span of seven months. The actor did it because he thought a fatter version character would be funnier. Further, he also wanted to break the norm that actors got more attractive with every new season of a show. 

Rob McElhenney as fat Mac in the seventh season of It's Always Sunny In Philadelphia
Source : facebook

To successfully complete the task, Rob adopted a high-calorie diet, which included a 1000-calorie meal five times a day for months. He mostly ate chicken breast, rice, vegetables, and protein shakes. In the later months, he also introduced donuts and Big Mac into his diet. 

McElhenney initially wanted all of his co-stars to gain weight for the seventh season of the show. However, all of the major cast declined his offer, which included his wife Kaitlin Olson.

Weight Loss Following The End Of Season 7

Rob McElhenney didn't stay fat for long as he immediately started a weight loss process following the end of the show's season 7.

In fact, Rob got jacked for season 8 of the show. The actor shed off his extra weight to achieve a physically ripped look.

The actor talked about his workout routine and diet during the process with Men's Health magazine.

McElhenney mentioned that he ate a lot of chicken during the period and visited his physician 2-3 times a week.

His routine also included weightlifting, sleeping nine hours, and running three miles. Rob avoided the intake of alcohol and sugar for a healthier diet. 

His Current Height, Weight And Body Measurement

Rob is now back to his normal weight as he didn't maintain the extensive workout and diet restriction for long.

The actor stands at a tall height of nearly 5 feet and 10 inches. Likewise, he weighs around 160 pounds in 2022.

McElhenney has a BMI [Body Mass Index] of 23, which is considered normal or healthy for a 45-year-old.

Rob McElhenney appeared in his normal weight in 2021
Source : instagram