“He will be truly missed.

This is a sad day for us at the agency and for the dance community as a whole.”

Onik was born in Kharkov, Ukraine.

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Serge Onik.FOX Image Collection via Getty Images

His family moved to the U.S. when he was just 3.

The trained ballroom dancer made it to the top 20 ofSYTYCDin 2014, but was eliminated in week 4.

At one time,Onik was a student of Alley’s formerDancing With the Starsprofessional partner,Maksim Chmerkovskiy.

DWTSalum Elena Grinenko shared a childhood photo of Onik as she mourned him on Instagram.