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

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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:

36 PHOTOS
Mama June through the years
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Mama June through the years
NEW YORK, NY - APRIL 06: Mama June appears on The Jenny McCarthy Show at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June visits at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 06: Mama June (L) and Jenny McCarthy appear at SiriusXM Studios on April 6, 2017 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - APRIL 05: (L-R) Mama June, AJ Calloway, and Honey Boo Boo pose on the set of 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June visits 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
NEW YORK, NY - APRIL 05: Mama June (L) and daughter Honey Boo Boo visit 'Extra' on April 5, 2017 in New York City. (Photo by D Dipasupil/Getty Images for Extra)
LOS ANGELES, CA - JANUARY 18: Honey Boo Boo and her mom Mama June along with sister Pumpkin in Beverly Hills, Ca on January 18, 2016 in Los Angeles, California. (Photo by Light Brigade/Bauer-Griffin/GC Images)
LOS ANGELES, CA - OCTOBER 15: June Shannon and Alana 'Honey Boo Boo' Thompson are sighted at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/FilmMagic)
NEW YORK, NY - JULY 15: June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Rob Kim/Getty Images)
MCLEAN, VA- July 11: Mike 'Sugar Bear' Thompson attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson (L) and June Shannon visit 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
ATLANTA, GA - JANUARY 05: Alana 'Honey Boo Boo' Thompson and Mama June Shannon attend the ATL Premiere Of WE Tv's 'Growing Up Hip Hop' at SCADshow on January 5, 2016 in Atlanta, Georgia. (Photo by Prince Williams/WireImage)
HOLLYWOOD, CA - NOVEMBER 19: (L-R) TV personalities Lauryn 'Pumpkin' Thompson, Mike 'Sugar Bear' Thompson, Alana 'Honey Boo Boo' Thompson and June 'Mama June' Shannon attend We tv's celebration of the premieres of 'Marriage Boot Camp Reality Stars' and 'Ex-isled' at Le Jardin on November 19, 2015 in Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (R) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson visits 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
NEW YORK, NY - APRIL 04: Alana Thompson aka. Honey Boo Boo and June Shannon aka. Mama June seen out in Manhattan on April 04, 2013 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (L) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
UNIVERSAL CITY, CA - SEPTEMBER 09: Mike Thompson (L) and June Shannon visit 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
Mama June and Sugar Bear
Mama June and Sugar Bear
UNIVERSAL CITY, CA - SEPTEMBER 09: June Shannon visits 'Extra' at Universal Studios Hollywood on September 9, 2013 in Universal City, California. (Photo by Noel Vasquez/Getty Images for Extra)
Honey Boo Boo and family dressed as the Kardashians.
LOS ANGELES, CA - NOVEMBER 18: Mama June and Honey Boo Boo are seen at LAX on November 18, 2015 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
Honey Boo Boo and family
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0073 -- Pictured: (l-r) Television personalities Mama June and Honey Boo Boo during an interview with host Jimmy Fallon on June 11, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0073 -- Pictured: (l-r) Television personality Honey Boo Boo during an interview with host Jimmy Fallon on June 11, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
GOOD MORNING AMERICA - Honey Boo Boo and Mama June (Here Comes Honey Boo Boo) are guests on 'Good Morning America,' 2/5/14, airing on the ABC Television Network. (Photo by Fred Lee/ABC via Getty Images) AMY ROBACH, MAMA JUNE, HONEY BOO BOO
NEW YORK, NY - JULY 15: Honey Boo Boo's mother June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Charles Norfleet/FilmMagic)
MCLEAN, VA- July 11: June 'Mama' Shannon attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
MCLEAN, VA- July 11: Alana 'Honey Boo Boo' Thompson attends the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
JIMMY KIMMEL LIVE - 'Jimmy Kimmel Live' airs every weeknight, (12:00 - 1:06 a.m., ET), following 'Nightline,' packed with hilarious comedy bits and features a diverse lineup of guests including celebrities, athletes, musicians, comedians and humorous human interest subjects. The guests for MONDAY, OCTOBER 15 included actor Aziz Ansari ('Parks and Recreation'), Alana 'Honey Boo Boo' Thompson and June 'Mama' Shannon ('Here Comes Honey Boo Boo') and musical guest Josh Turner. (Photo by Richard Cartwright/ABC via Getty Images) JUNE 'MAMA' SHANNON, ALANA 'HONEY BOO BOO' THOMPSON, JIMMY KIMMEL
LOS ANGELES, CA - OCTOBER 15: Alana 'Honey Boo Boo' Thompson and her mother June Shannon (L) visit 'Extra' at The Grove on October 15, 2012 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images for Extra)
Honey Boo Boo színre lép (3. évad)
MCLEAN, VA- July 11: June 'Mama' Shannon, Mike 'Sugar Bear' Thompson, Alana 'Honey Boo Boo' Thompson, Anna 'Chickadee' Shannon and Lauryn 'Pumpkin' Shannon attend the 'How to Honey Boo Boo: The Complete Guide' Book Event at the Barnes and Nobles on July 11, 2013 in Mclean, Virginia. (Photo by Kris Connor/Getty Images)
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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:

14 PHOTOS
Mama June and Pumpkin, "Here comes Honey Boo Boo"
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Mama June and Pumpkin, "Here comes Honey Boo Boo"
(photo credit: Inside Edition)
(photo credit: Inside Edition)
(photo credit: Inside Edition)
(photo credit: Inside Edition)
(photo credit: Inside Edition)
(photo credit: Inside Edition)
I don't know but I think I maybe Fallin' for you dropping so quickly Maybe I should keep this to myself Waiting 'til I know you better I am trying not to tell you But I want to I'm scared of what you'll say So I'm hiding what I'm feeling But I'm tired of holding this inside my head
Come hangout with us in Albany the whole honey boo boo clan is here. The Albany Exchange Fair Grounds: Wing Feast.
GOOD MORNING AMERICA - Honey Boo Boo and Mama June (Here Comes Honey Boo Boo) are guests on 'Good Morning America,' 2/5/14, airing on the ABC Television Network. (Photo by Fred Lee/ABC via Getty Images) 
June Shannon appears at a "How To Honey Boo Boo: The Complete Guide" book event, held at Barnes & Noble Citigroup Center, New York
June Shannon attending the 24th GLAAD Media Awards at the Marriott Marquis Hotel in New York.
NEW YORK, NY - JULY 15: Honey Boo Boo's mother June Shannon attends the 'How To Honey Boo Boo: The Complete Guide' Book Event on July 15, 2013 in New York, New York. (Photo by Charles Norfleet/FilmMagic)
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