Mama June reveals the reason behind her jaw-dropping weight loss

Now we know the real reason behind Mama June's shocking weight loss transformation being documented on her WEtv show, "Mama June: From Not to Hot."

The former "Here Comes Honey Boo Boo" star revealed the unexpected information in an exclusive clip from the show on People's website that shows her talking to her personal trainer, Kenya Crooks.

SEE ALSO: Mama June shows off shockingly slimmer figure as she heads to gym -- Watch!

"The reason why I'm pushing you so hard is I know you can do better," Crooks says to Mama June in the clip. "Question: Why are you doing this?"

"I'm trying to lose weight for Sugar Bear's wedding because my ex is getting married," she admits while swinging on a swing-set next to Crooks. "I'm trying to rebrand myself as, like, the skinnier Mama June."

See photos of Mama June:

And she's definitely skinnier now. Mama June is reportedly a size 4 now, which was her goal size going into her extreme weight loss transformation. She was originally a size 18. In another recent clip from the show, the reality TV star shows off her much slimmer figure for the first time as she heads to the gym, which you can watch here. It's unclear is that is what Mama June looks like now, but it's certainly a transformation.

In response to Mama June's reasoning for wanting to lose weight, Crooks retorts that "at some point you have to make a conscientious decision to start putting yourself first."

"I want to be the hottest thing at this wedding," Mama June explains. "But I'm honestly scared because I'm not sure I'm going to be able to reach my goal or not."

She goes on to reveal that she has a "goal dress" to wear to the wedding that shows off her cleavage and her legs. It's a size 4.

Watch the clip in the video above.

See more photos of Mama June with her daughter:

More from AOL.com:
'The Little Mermaid' live-action trailer is here -- and it's extraordinary
'Missing Richard Simmons': Inside the theories regarding the fitness guru's whereabouts
Nicki Minaj challenges Remy Ma to drop a hit in 72 hours, offers half a million dollars