Karel Sivák Biography: YouTube, Net Worth, Age, Movies, Parents, Height, Ethnicity, Girlfriend

Karel Sivák, known professionally as FattyPillow, is a prominent Czech YouTuber, streamer, entertainer, and occasional actor.

He built his reputation primarily as a comedic content creator and live streamer, delivering humorous commentary, gaming sessions, reactions, and entertaining banter that resonates with a dedicated Czech-speaking audience.

Active since the mid-2010s, he shifted platforms over time from Twitch to Kick while maintaining a strong YouTube presence for highlights and clips, and he has appeared in minor film roles, contributing to his visibility beyond online spaces.

Quick Facts

• Full Name: Karel Sivák
• Stage Name: FattyPillow
• Born: 15 August 1992
• Age: 33 years old
• Birthplace: Třebíč, Czechia
• Nationality: Czech
• Occupation: YouTuber, Streamer, Entertainer, Actor
• Height: Unknown
• Parents: Lenka Siváková and Mr. Sivák
• Siblings: Unknown
• Spouse: None
• Children: None
• Relationship: Single
• Net Worth: $1 million

Early Life and Education

Karel Sivák was born on August 15, 1992, in Třebíč, Czechia, to Lenka Siváková, and Mr. Sivák. He might have had siblings but details about them are unknown.

Public information on his formal education, including schools attended or degrees earned, remains limited and undisclosed. Ethnicity is Czech, and religion is unknown.

Career

Karel Sivák launched his online career in his early twenties under the alias Tlustej Kárl, posting comedic videos and content on YouTube that quickly drew attention for its raw humor and personality-driven style.

He transitioned to the FattyPillow moniker around 2014, focusing on streaming live sessions that combined gaming, reactions, and entertaining interactions, earning him recognition as one of Czechia’s notable internet personalities and even receiving a YouTube award in 2015 for his growing channel.

His key accomplishments include amassing a substantial following across platforms, with hundreds of thousands of subscribers and followers, and expanding into live streaming where he engages viewers for extended sessions.

He ventured into acting with cameo or supporting roles in Czech films like Gump – Una Lección de Vida (2021) and Three Tigers in the Movie: Jackpot (2022), blending his online fame with traditional media appearances.

These steps marked his evolution from solo YouTube creator to a multi-platform entertainer capable of charitable efforts, such as high-profile streams raising significant funds.

Karel Sivák holds a solid place in the Czech digital entertainment scene through consistent streaming on Kick, YouTube clips, and merchandise ventures.

His influence persists among fans who appreciate his unfiltered humor and community engagement, while occasional music releases and collaborations reinforce his role as a versatile online figure with lasting appeal in local internet culture.

Social Media

• Instagram Handle: @fattypilloww
• Facebook Handle: Unknown
• Twitter Handle: @fattypillow

Personal Life

Karel Sivák personal life is unknown and he has kept it away from his on-screen persona.

He was in a long-term relationship with a girlfriend for about five years until their breakup in early 2023, after which he shared feelings of helplessness and loss publicly.

No spouse or children are known. He keeps family details minimal, focusing public attention on his content and streams rather than private matters.

Net Worth

Karel Sivák has an estimated net worth of around $1 million. His primary sources of income include revenue from streaming donations and subscriptions on platforms like Kick, YouTube monetization and ad earnings, merchandise sales through his official store, brand collaborations, and occasional earnings from film appearances or other media projects.

Filmography

• Gump – Una Lección de Vida (2021)
• Three Tigers in the Movie: Jackpot (2022)