Real-life uncle-and-nephew duo Joseph Fiennes and Hero Fiennes Tiffin are promoting their new project together!

Joseph and Hero hit the red carpet for the premiere of their new Prime Video series Young Sherlock on Tuesday (February 24) at Queen Elizabeth Hall in London, England.

Hero is playing the role of a 19-year-old Sherlock Holmes when he was an amateur investigator at Oxford University and Joseph is playing his father Silas Holmes.

For those who don’t know, Hero‘s mother Martha Fiennes is Joseph‘s older sister!

Also in attendance at the premiere were co-stars Zine Tseng, Donal Finn, Max Irons, and Numan Acar, as well as director Guy Ritchie.

Watch the trailer for the new series and catch it on Prime Video on March 4.

Browse through the gallery for 20+ photos from the premiere…