Hero Fiennes Tiffin walks the red carpet for the premiere of Young Sherlock

Hero Fiennes Tiffin walks the red carpet for the premiere of Young Sherlock. The star has taken on the lead of Guy Ritchie's new series on Amazon Prime that examines the origins of the beloved character. Tiffin was also joined on the carpet by his famous uncle, Joseph Fiennes, who plays Sherlock's father in the new series, premiering on March 4.