Robertson had been rumoured to be a surprise entrance for Monday's Dancing with the Stars premiere, but an insider denied the reports to Us Magazine.
"It's definitely not true. The first episode is almost totally together now and everyone has learned their dances," the source said.
An ABC spokesperson previously refused to provide any solid confirmation of Robertson's casting when questioned by reporters on Thursday (March 15).
"We do not comment on casting rumours. You'll have to tune in Monday and see," the ABC rep teased.
Dancing with the Stars premieres its new season Monday, March 19 on ABC.
Robertson triumphed over competitor Lindzi Cox in this week's season finale of The Bachelor. The final episode ended with Robertson accepting Ben Flajnik's marriage proposal.
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