We turn now to an encouraging weight loss story from a woman who tried to get in shape until her sister asked her to be her maid of honor. That was the motivation she needed to cut her weight in half.... See More
We turn now to an encouraging weight loss story from a woman who tried to get in shape until her sister asked her to be her maid of honor. That was the motivation she needed to cut her weight in half. ABC's bianna golodryga has the story. Reporter: Weddings, a monumental time in one's life. But for Jamie she never thought that someone else's wedding would change her own life. Growing up I was always the biggest, tallest kid. You know, I would just come home after school, maybe not fitting in very well and would turn to that food. Reporter: The 30-year-old mental health therapist tried everything to lose weight. But after getting the call in the fall of 2006 to be maid of honor in her stepsister's wedding she had that aha moment. I knew I needed to regain control of my life that I let go. Reporter: Her aunt recommended she try weight watchers and by the time of the wedding in June of 2007 Jamie reached a milestone, 80 pounds gone. I got good compliments which gave me even more motivation to keep going. Reporter: And keep going, she did. After the birthher daughter Anna in 2010 Jamie's weight loss hit a plateau but in January of 2013 she recommitted to her goal and picked up running losing 160 pounds total. I went from a size 24 and now I'm into a size 4. Half of me is gone. Shedding more than half of her original weight of 304 pounds. She just exudes beauty, not that she wasn't before, but just the confidence, it's amazing. Reporter: Jamie thankful for her husband's support along the way. It's amazing. To have that support and knowing that no matter what that there's always somebody that's going to be there for you. Reporter: Her husband is now on his own weight loss journey dropping 90 pounds so far. And the best reward, the admiration of now 3-year-old Anna. Mommy, I want to run just like you and that melts my heart. Reporter: For "Good morning America," bianna golodryga, ABC news, New York.
This transcript has been automatically generated and may not be 100% accurate.