Comedian and TV personality Ross Mathews posted a picture of his dramatically slimmed-down frame to Instagram Sunday, updating fans on his weight-loss journey.

“Breaking the pattern,” Mathews, 41, wrote. “50lbs down today from my height in early June when I decided to reclaim my health after my mom died (70lbs down from my all-time).”

“I will always be a work in progress,” he added. “I may mess up again. I dunno. All I know is that I’m very grateful. And very happy. On we go…”

Mathews has been open about his weight loss journey for years. In 2010, Mathews, then around 220 pounds, joined Jenny Craig at the urging of Gwyneth Paltrow, who, during a TV taping, “pointed at my tummy and said, ‘What’s going on here? I love you. Get it together,'” he told People in 2011.

But he struggled with keeping the weight off, joking to the Columbus Dispatch earlier this year that, “I’m a weight detective: ‘If I lose it, I can always find it.'”

Mathews’ mother died in May; he dedicated a moving tribute to her on Instagram, writing, “I can’t imagine a world without her … She was my audience of one, my head cheerleader, my VIP. And now she’s gone, taken before any of us were ready.”

“I hope — no, I know — that her spirit lives within me and I will spend the rest of my life trying to be as good as she was, as kind as she was and authentic as she was.”