Potential face claims for Regulus Black:

NAME: Skandar Keynes
DATE OF BIRTH: 5 September 1991
NATIONALITY: British
EYE COLOUR: brown
HAIR COLOUR: dark brown/black

NAME: Logan Lerman
DATE OF BIRTH: 19 January 1992
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: dark brown/black

NAME: Darwin Gray
DATE OF BIRTH: 11 April 1996
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: brown/black

NAME: Erin Mommsen
DATE OF BIRTH: 1996
NATIONALITY: American
EYE COLOUR: blue
HAIR COLOUR: brown

NAME: Keisuke Asano
DATE OF BIRTH: 23 March 1995
NATIONALITY: Japanese
EYE COLOUR: black
HAIR COLOUR: black

NAME: Ezra Miller
DATE OF BIRTH: 30 September 1992
NATIONALITY: American
EYE COLOUR: black
HAIR COLOUR: black

NAME: Asa Butterfield
DATE OF BIRTH: 1 April 1997
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: black

NAME: Matthew Bell
DATE OF BIRTH: 28 August 1993
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: black

NAME: Markel Williams
DATE OF BIRTH: 5 September 1995
NATIONALITY: American
EYE COLOUR: black
HAIR COLOUR: black

NAME: Timothée Chalamet
DATE OF BIRTH: 27 December 1995
NATIONALITY: American and French
EYE COLOUR: hazel
HAIR COLOUR: dark brown

NAME: Liam Samuels
DATE OF BIRTH: 20 July 1998
NATIONALITY: Thai and American
EYE COLOUR: dark brown
HAIR COLOUR: dark brown

(suggested by spottybob and kencbi)