Jack Bing is one of Monica and Chandler's two children. Monica and Chandler adopted Jack and his twin sister Erica from a girl, also named Erica, living in Ohio.
Quick Answers
Who are Jack Bing's biological parents?
The biological mother of Jack Bing is Erica from Ohio. His adoptive parents are characters from the TV show 'Friends', Monica Geller and Chandler Bing. Jack has a twin sister, Erica Bing, who was also adopted by Monica and Chandler.
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How did Monica and Chandler react when they found out they were adopting twins?
Upon discovering they were adopting twins from Erica, Monica and Chandler were surprised but quickly agreed to keep both babies. They named the boy Jack, in honor of Monica's father, and the girl Erica, after their birth mother. Despite Chandler's initial hesitation, Monica insisted on keeping both children, emphasizing their familial bond.
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Who is Jack Bing's twin sister?
Erica Bing is the twin sister of Jack Bing. They were adopted by Monica and Chandler from a woman, also named Erica, residing in Ohio. Their birth occurred in the series finale of 'Friends', with Monica and Chandler initially unaware they were to receive twins.
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Where was Jack Bing's biological mother living when Monica and Chandler adopted him?
Monica and Chandler adopted Jack Bing and his twin sister Erica from their biological mother, Erica, who was residing in Ohio at the time.
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Character
Jack and Erica were born in the series finale. Monica and Chandler were unaware at the time of their birth that they would be receiving twins and Monica had to calm Chandler down at first. Upon seeing Jack for the first time, Chandler commented that he had Monica's eyes (despite acknowledging that it was impossible for this to actually be the case).

Jack was named after his adopted grandfather. Phoebe commented that his full name sounded like a 1940's reporter.
Trivia
- According to Monica in "The One Where Rachel Has A Baby, Part 2", she had wanted to name her future son Daniel. However when she did have a son, she named him Jack.
- Jack was the first of the twins to be born.
- Jack Bing would be 20–21 as of 2025.