In fact, the Sherlock star has even provided his own commentary on Rinder’s latest dance, the jive to Boogie Woogie Bugle Boy by The Andrew Sisters.
In a video for BBC Radio 1, Cumberbatch shares such knowledgeable comments as “he’s spinning her to the left and then the right, it’s difficult to tell on television” and “he’s kicking out, it’s all good though – they’re not kicking each other.”
“He’s amazing, he’s so good,” Cumberbatch confirms.
You might expect that kind of loyalty given that the Judge Rinder star was best man at Cumberbatch’s wedding, while Cumberbatch officiated Rinder’s own ceremony when the he married his long-term boyfriend in 2013.
The two have been close friends since meeting at Manchester University.