Quoc: Witney was announced as a troupe dancer on reality television series, Dancing with the Stars in March 2013. Carson (along with DWTS pro dancer, Lindsay Arnold) was a contestant on So You Think You Can Dance season nine. She continued dancing and choreographing for the troupe on season 17.

When did witney carson start dancing with the stars?
HW Chung: OK, some thoughts:
The relevant sentence in the passage is: Witney was announced as a troupe dancer on reality television series, Dancing with the Stars in March 2013. The answer is March 2013.