Spencer X
Spencer X is a New York-born beatboxer and creator who turns mouth sounds into music, playful challenges and sound effects, with screen appearances including Smurfs.
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Latest
Spencer’s happenings, collected from public sources, plus their backstory and Starbook, where fans write.
Known for
YouTube
YouTube
YouTubeOverview
- Name
- Spencer Polanco Knight
- From
- Manhattan, New York City
- Craft
- Beatboxing, music and online videos
- Breakout
- TikTok, 2019
- On screen
- Sound Effects Smurf in Smurfs (2025)
Mini bio
How it started.
Spencer grew up in Manhattan and practiced for passersby in Union Square before finding a large audience online. In a 2022 HOLA! USA interview, Spencer recalled a friend on the high school tennis team demonstrating beatboxing, prompting a rush home to research and practice.
Finding an audience.
After years of posting on Instagram and YouTube, TikTok brought a breakthrough in 2019. Spencer told HOLA! USA that an early TikTok video went viral and that the goal of making a beat every day became a much larger body of work. Forbes later included Spencer in its 2021 Social Media 30 Under 30 list.
Beyond the feed.
The videos range from vocal imitations to original beatbox music, including “Be Somebody.” Collaborations have included Alicia Keys, Sean Kingston and Marshmello. Spencer also made a cameo in He’s All That and voiced Sound Effects Smurf in the 2025 animated film Smurfs.
Creditschronological, newest first
Film
- 2025SmurfsSound Effects Smurf, voice
- 2021He’s All ThatKaraoke DJ Bryson
Music and videos
- 2020Be SomebodyArtist and vocal performer
- 2016Be Somebody (Beatbox Music Video)Artist and vocal performer
- 2015One Beatboxer, 20 Sound EffectsCreator and vocal performer
Awards
Quotes
So beatboxing is the art of creating sound.Spencer X, HOLA! USA
Explaining beatboxing in the March 21, 2022 interview: https://www.hola.com/us/celebrities/20220321330479/tiktok-star-spencer-x-professional-beatboxer-interview/
Trivia
- Spencer’s family background is Ecuadorian and Chinese, discussed in the HOLA! USA interview.
- Spencer studied advanced theater in high school and told HOLA! USA about doing improv comedy.
- The 2015 sound-effects video turns sounds including a vibrating phone, water and a bike chain into beats.
- The 2016 “Be Somebody” video describes its track as recorded live using only Spencer’s vocals.
Find Spencer
Find new beats, challenges and card openings on Spencer’s official channels.
Are you Spencer X?
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