At age 17, he was disowned by his parents (both of them Jehovah's Witnesses) for being gay, leading him to finance his education independently in the Savannah College of Art and Design.

[3] Sebastian Castro came out as gay on a Philippine podcast Beki Nights shortly after releasing his viral music video.

"[4] In 2014, Sebastian Castro and former ABS-CBN Reporter Ryan Chua publicly acknowledged their relationship over social media.

[7] In April of the following year, several showbiz outlets romantically linked Castro to actor and TV host Paolo Ballesteros after photos of them together surfaced.

[2][3] Castro has landed several major product endorsements in SouthEast Asia, including Jollibee, Pantene Hair, and Sun Cellular.