Justin Bieber has a best man speech to prep!

The singer's dad, Jeremy Bieber, proposed to girlfriend Chelsey Rebelo on Feb. 19 in St. Barts, and shared a video of the special moment on YouTube.

The 41-year-old, clad in an all-white ensemble, can be seen leading his bride-to-be, 28, up to a viewing point where he popped the question. Chelsey responds with a shocked, "Oh my god."

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According to TMZ, Justin and his family support Jeremy's relationship, though the 21-year-old was not in St. Bart's to witness the proposal. He instead spent the day at Universal Studios Hollywood with his six-year-old half-brother Jaxon.

justin bieber jaxon getty images

Justin and Jaxon at the 2016 Grammys.

The "Sorry" hitmaker recently brought his younger sibling as his date to the Grammys on Feb. 15, where he picked up his first award for Best Dance Recording.

Congrats to the happy couple!