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Katie Donnelly

Born
Jun 25, 2004age 22
height
5'3" (or 160 cm)
nationality
American

Biography

About Katie Donnelly

Edited by the community

Katie Donnelly is a YouTuber known for her engaging vlogs on the family channel, It's The Donnellys, which has amassed over 1.1 million subscribers. Born on Friday, 25th of June 2004, in the United States, she is American with a mixed-race background that is primarily Caucasian. At 22 years old, she stands 5'3" tall with blonde hair and brown eyes, and she has an average build. Her early life was steeped in athletics; she was a level nine gymnast, swimmer, coral girl, and cheerleader. Notably, she was a level 7 State Champion gymnast in all around, bars, beam, and floor in 2016 before transitioning to cheerleading.

Katie's YouTube journey began with her original channel, Flippin' Katie, in May 2015, where she quickly gained over 100,000 subscribers in just three months. Her popularity soared with the video "The Great Watermelon Challenge(s)", which collected more than 2 million views in a single month and over 13.2 million views by early 2016. Familial support is central to her content; her older brother Brennan and younger brother Ryan appear on her channel, and her parents are Jill and Mike. A former boyfriend, Caden, has also made appearances on the family's channel.

In the online gymnastics community, Katie is part of The Coral Girls collective, also known as Gymscool, alongside gymnast Arden Martino. With a strong Instagram presence of 911k followers, she continues to share her life and interests with a growing audience. She is a content creator who blends her athletic background with family-focused entertainment.

Record

Profile details

Personal

Birthplace
United States

Body

Hair Color
Blonde
Eye Color
Brown
Weight
123 lbs (or 56 kg)
Measurements
32–24–35 (B–W–H) · WHR 0.69
Bra/Cup Size
32A show conversions - UK: 32A, EU: 70A, AU: 10A, JP: 70A

Extra

Instagram Followers
911k (as of June 2026)

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Frequently asked

What is Katie's background in gymnastics?

Katie was a level nine gymnast and a level 7 State Champion in all around, bars, beam, and floor in 2016 before she shifted to cheerleading.

How did Katie start her YouTube career?

She launched her original channel Flippin' Katie in May 2015 and earned over 100,000 subscribers within three months.

What is the significance of "The Great Watermelon Challenge(s)" video?

The video accumulated more than 2 million views in one month and exceeded 13.2 million views by early 2016, demonstrating her early viral success.

Who are the members of The Coral Girls collective?

Katie and gymnast Arden Martino are part of The Coral Girls collective, also known as Gymscool.

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