Mama June unveils some of her dramatic weight loss in a preview for Friday's episode of "Mama June: From Not to Hot."

The 37-year-old reality star, born June Shannon, showed off her slimmer figure while discussing ex-partner Sugar Bear's wedding with daughter Honey Boo Boo, real name Alana Thompson.

The clip sees Honey Boo Boo tell her mom that Sugar Bear's fiancee, Jennifer, asked her to help pick out her flower girl dress for the wedding. Mama June and Sugar Bear, born David Thompson, split in 2014.

"She asked me to go pick out some flower girl dresses for the wedding, just me and her," the 11-year-old said.

"I don't want to go by myself, so I was going to ask you if you want to come. For not Sugar Bear, not Jennifer -- for me, for my support."

"Mama June: From Not to Hot" documents Mama June's body transformation after having gastric sleeve surgery in May 2015.

Honey Boo Boo and sister Pumpkin, born Lauryn Thompson, discussed the change with Entertainment Tonight in February.

"I kind of didn't want her to do it before, but after she did it, I'm very happy," Honey Boo Boo said of her mom's weight loss surgery.

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"I think that her biggest thing [to] overcome is that fact that she still thinks of herself as a bigger person," Lauryn shared. "Even to this day, like, a couple days ago we had a conversation, and ... she looked in the mirror and was like, 'I'm still fat.'"

Mama June had teased Friday's episode last week, telling fans, "next week will b even more crazier when we get to the slim down."

She and her family initially came to fame on the TLC series "Here Comes Honey Boo Boo."