The Hollyoaks actor is being held by officers in Liverpool after an alleged incident early this morning.
Merseyside police confirm a 29-year-old man from Billinge, Greater Manchester, is being questioned.
The incident is said to have involved a collision between a car and a male pedestrian, who suffered minor injuries.
Ricky, 29 - who plays Calvin Valentine in Hollyoaks - is favourite to win Strictly Come Dancing.
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